Inventors list |
Assignees list |
Classification tree browser |
Top 100 Inventors |
Top 100 Assignees |
Leung, HK
Alan Leung, Chai Wan HK
| Patent application number | Description | Published |
|---|---|---|
| 20090061120 | CONVERTIBLE/INVERTED TREE - An invertible decorative tree having sections that are each provided with complementary receiving portions and/or extending members. The sections include a stand, a trunk segment, at least one tree body, and a tree top. Through the complementary relationships of the receiving and associating mechanisms, the tree can be arranged to provide a triangular appearance with its apex at the top or its apex near the bottom. In order to provide for this inversion, the tree top is equipped to connect with the trunk segment or with a tree body segment. | 03-05-2009 |
Ambrose Shing-Yin Leung, Kwai Chung HK
| Patent application number | Description | Published |
|---|---|---|
| 20100110669 | Light retainer assembly - Light emitting devices having unitary and simplified construction for securing a lighting assembly within the device, and ease of replacement of the light emitting element of the lighting assembly. The lighting assembly is mounted within the light emitting device though use of a fastener. | 05-06-2010 |
Anthony Kit Lun Leung, North Point HK
| Patent application number | Description | Published |
|---|---|---|
| 20100024492 | COMPACT STEAM APPLIANCE WITH FOLDING HANDLE - A portable steamer ( | 02-04-2010 |
| 20100108831 | CURLING IRON SHIELD AND STAND COMBINATION - A curling iron stand | 05-06-2010 |
| 20100180908 | HAIR STRAIGHTENING APPLIANCE WITH VARIABLE STEAM OUTPUT CONTROL - A hair straightening device | 07-22-2010 |
Benson Chung-Pun Leung, Kwai Chung HK
| Patent application number | Description | Published |
|---|---|---|
| 20100110669 | Light retainer assembly - Light emitting devices having unitary and simplified construction for securing a lighting assembly within the device, and ease of replacement of the light emitting element of the lighting assembly. The lighting assembly is mounted within the light emitting device though use of a fastener. | 05-06-2010 |
Chan Siu Leung, Ho Man Tin HK
| Patent application number | Description | Published |
|---|---|---|
| 20100175523 | LOW-EFFORT PAPER PUNCH - A punch comprises a handle and arms on a hinge that change their mechanical advantage against punching heads as the arms pass through the middle part of their travel. Each punching head has a pin near the hinge that passes through slots in the arms radial to the hinge, and through vertical slots tangent to the hinge in punching head towers. A Class-2 type lever arrangement results with the hinge acting as the fulcrum. The mechanical advantage of the handle and arms reaches a maximum when the punching head pins shuttle closest to the hinge. The cutting faces of the punching heads are finished with a saddle contour and set at an angle, with one extending a bit further down into a paper slot than the other. The result is a substantial reduction in effort required of the user. | 07-15-2010 |
Chi Keun Vincent Leung, Tin Shui Wai HK
| Patent application number | Description | Published |
|---|---|---|
| 20090294974 | BONDING METHOD FOR THROUGH-SILICON-VIA BASED 3D WAFER STACKING - There is described a bonding method for through-silicon-via bonding of a wafer stack in which the wafers are formed with through-silicon-vias and lateral microchannels that are filled with solder. To fill the vias and channels the wafer stack is placed in a soldering chamber and molten solder is drawn through the vias and channels by vacuum. The wafers are held together by layers of adhesive during the assembly of the wafer stack. Means are provided for local reheating of the solder after it has cooled to soften the solder to enable it to be removed from the soldering chamber. | 12-03-2009 |
Chi Kuen Vincent Leung, Shatin HK
| Patent application number | Description | Published |
|---|---|---|
| 20090293604 | MULTI-CHIP PACKAGE - Subject matter disclosed herein may relate to packaging for multi-chip semiconductor devices as may be used, for example, in tire pressure monitoring systems. | 12-03-2009 |
Chi Kuen Vincent Leung, Tin Shui Wai HK
| Patent application number | Description | Published |
|---|---|---|
| 20110147908 | Module for Use in a Multi Package Assembly and a Method of Making the Module and the Multi Package Assembly - The module comprises a first substrate and at least one chip mounted on the first substrate. A second substrate is mounted to the first substrate and has an opening therein. The opening is lined with the at least one chip. The second substrate is overmolded and the first substrate is electrically connected to the second substrate by at least one first electrical connector. At least one second electrical connector extends from the second substrate through the overmold and has its exposed ends for electrical connection to an external module. The external module may be mounted to the first module in order to form a package on package assembly. | 06-23-2011 |
Chi Tak (gerry) Leung, Hong Kong HK
| Patent application number | Description | Published |
|---|---|---|
| 20120126901 | PROGRAMMABLE ELECTRO-MAGNETIC-INTERFERENCE (EMI) REDUCTION WITH ENHANCED NOISE IMMUNITY AND PROCESS TOLERANCE - A frequency dithering circuit reduces emissions that cause Electro-Magnetic Interference (EMI) by spreading the spectrum of a clock. The clock sequences a counter that drives a digital count value to a digital-to-analog converter (DAC). The DAC outputs a sawtooth wave with a wide voltage swing. A subtractor scales down the voltage swing to produce a reduced-swing sawtooth wave which is used as an upper limit voltage. Comparators trigger a set-reset latch to toggle the clock when current pumps charge and discharge a capacitor beyond voltage limits. Since the upper limit voltage is the reduced sawtooth wave from the subtractor, the amount of time to charge the capacitor varies, dithering the period of the clock. The degree of dithering can be adjusted by programming the feedback resistance in the subtractor. The subtractor reduces the sensitivity of dithering to errors in the DAC, allowing for an inexpensive, less precise DAC. | 05-24-2012 |
Chi-Wah Leung, Chaiwan HK
| Patent application number | Description | Published |
|---|---|---|
| 20110073690 | COMBINATION COFFEE GRINDER AND COFFEE STORAGE DEVICE - In a combination coffee grinder and coffee storage device, a housing has a grinding chamber and a storage container located with the housing. The storage container has a removable airtight closure and the grinding chamber has grinding blades. A motor is located in the housing for driving the grinding blades. A pump, located in the housing, has an air connection to the storage container for evacuating air from the storage container. The pump is operated by the motor for evacuating air from the storage container while the motor is simultaneously driving the grinding blades | 03-31-2011 |
Chun Kai Leung, Shatin HK
| Patent application number | Description | Published |
|---|---|---|
| 20110050120 | LIGHTING CONTROL SYSTEM AND LED LAMP - A lighting control system and an LED lamp for use with the lighting control system are provided. In one embodiment, the LED lamp includes a color LED including a red LED, a green LED, and a blue LED, and a lamp contact having a first contact section, a second contact section, and a third contact section, each of the first contact section, the second contact section, and the third contact section including a positive contact and a negative contact, wherein the first contact section is electrically connected to the red LED, the second contact section is electrically connected to the green LED, and the third contact section is electrically connected to the blue LED. The lighting control system may include an LED driver unit configured to provide independent electrical connection with each of the contact sections of the LED lamp. | 03-03-2011 |
Gary Leung, Hongkong HK
| Patent application number | Description | Published |
|---|---|---|
| 20080288351 | System and Method for Facilitating Electronic Financial Transactions Using a Mobile Telecommunication Device - A transaction processing system for processing a transaction between a supplier and a customer, said system comprising a supplier device for initiating the transaction, a system server and a mobile communication device, said device containing a message processing program module for enabling local verification of the transaction within the mobile device, wherein a transaction message is sent from the supplier device to the system server, a message requesting payment for the transaction is sent from the system server to the mobile communication device, the transaction is authorised and verified at the mobile telecommunications device from which a verification message is sent back to the system server, and the transaction is then processed. | 11-20-2008 |
Hang Ching Leung, Yuen Long HK
| Patent application number | Description | Published |
|---|---|---|
| 20090052411 | ADAPTIVE INTERFERENCE CONTROL - Systems and methods which control communications in a carrier sense multiple access environment to provide a balance between communication sensitivity and transmission availability are shown. Adaptive interference control techniques of embodiments operate to determine a media error time metric representing the time associated with receiving interfering signals. The media error time metric of embodiments is used to adjust operation of various network systems in order to adjust communication sensitivity and/or transmission availability. Desensitizing thresholds and sensitizing thresholds may be used to define operating boundaries, such that desensitizing thresholds are used to control network desensitize actions which result in decreased error times and sensitizing thresholds are used to control network sensitizing actions which result in increased error times. Error time metrics and corresponding desensitizing and sensitizing thresholds may be utilized with respect to a plurality of radios. Embodiments provide for adjustment of control parameters based upon historical operation. | 02-26-2009 |
| 20100027425 | FAIR WEIGHTED NETWORK CONGESTION AVOIDANCE - Systems and methods which provide network congestion avoidance implementing a fairness scheme in which a cost function is used are shown. Transmission cost, for use in network congestion avoidance packet dropping decisions, may be determined from an amount of air time needed to transmit a data packet, a transmission data rate, a size of a packet, an amount of spectral energy or transmit power associated with transmission, etc. A packet dropping probability for a particular packet is preferably determined as a function of the current flow cost and average flow cost to provide fair allocation of network communications resources. Embodiments additionally implement buffer based packet dropping probability calculation in order to provide a robust network congestion avoidance technique. Cost based packet dropping probability calculation and buffer based packet dropping probability calculation implemented according to embodiments are adapted to accommodate quality of service applications. | 02-04-2010 |
Hang Ching Leung, Yeun Long HK
| Patent application number | Description | Published |
|---|---|---|
| 20090005121 | SYSTEMS AND METHODS USING ANTENNA BEAM SCANNING FOR IMPROVED COMMUNICATIONS - Systems and methods which utilize antenna pattern or antenna beam scanning techniques to provide communication of payload traffic are shown. A base station radio is provided wireless communication links with a plurality of stations for communication of payload traffic between the base station and stations using a succession of antenna patterns. The antenna patterns are scanned in succession, such as randomly, quasi-randomly, sequentially, or according to a schedule. An antenna pattern scheduler may be used to implement antenna pattern scanning and traffic timing. Cooperative scheduling with respect to a plurality of base stations may be provided. Selection of the plurality of antenna patterns used by a base station is preferably adjusted from time to time, such as based upon environment, usage patterns, etcetera. | 01-01-2009 |
Hang Ching Jason Leung, Yuen Long HK
| Patent application number | Description | Published |
|---|---|---|
| 20100296439 | MULTI-FUNCTION WIRELESS APPARATUS - Systems and methods which provide a multi-function wireless node are shown. Multi-function wireless nodes of embodiments provide link completion infrastructure suited for a plurality of situations and environments, such as for repeaters, bridges, gateways, and APs. Embodiments provide a multi-function wireless node comprising a plurality of radios. Multi-function wireless nodes of embodiments further comprise a smart antenna system coupled to radios thereof and providing illumination within a service volume. The service volume of embodiments comprises a semi-spherical volume. Embodiments comprise a controller facilitating proper and/or optimal deployment and commissioning of the multi-function wireless node in each of a plurality of different link completion infrastructure forms. Embodiments further comprise a communication interface providing one or more information communication links in addition to those available through wireless links. | 11-25-2010 |
Hei Shun Leung, Tsuen Wan HK
| Patent application number | Description | Published |
|---|---|---|
| 20120003905 | SANDER - A sander has two abrasive-supporting base parts mounted to an oscillating drive mechanism. The base parts may support a sandpaper sheet, or the like, and are connected to one another in a manner allowing ready reconfiguration for different applications. One of the base parts is connected by a pivoting coupling to the other for movement between extended and retracted positions. Latching means releasably lock the coupling so as to hold the parts in the extended position. | 01-05-2012 |
Jason Leung, Yuen Long HK
| Patent application number | Description | Published |
|---|---|---|
| 20110032849 | SYSTEMS AND METHODS FOR MITIGATING INTERFERENCE BETWEEN ACCESS POINTS - Systems and methods which implement cooperative techniques at wireless network access points to provide interference mitigation are shown. Embodiments utilize cooperative antenna beam adaptation techniques wherein antenna beam selection, selective antenna beam transmission power, and/or antenna beam null selection is implemented based upon the communication environment created by a plurality of access points. Additionally or alternatively, embodiments utilize cooperative antenna beam isolation techniques wherein narrow channel filters are implemented with respect to antenna beam signals and/or shielding is provided between various antenna beams based upon the communication environment created by a plurality of access points. Embodiments additionally or alternatively utilize cooperative antenna beam coordination techniques wherein transmission and/or reception of signals is coordinated, the use of antenna beams is coordinated, and/or interference cancellation is implemented based upon the communication environment created by a plurality of access points. | 02-10-2011 |
Kwong Sak Leung, Shatin, Nt HK
| Patent application number | Description | Published |
|---|---|---|
| 20090061419 | GENOMIC MARKERS OF HEPATITIS B VIRUS ASSOCIATED WITH HEPATOCELLULAR CARCINOMA - The present invention provides methods of predicting a pre-disposition of HBV-infected individuals to develop hepatacellular carcinoma (HCC). | 03-05-2009 |
Lap Wai Leung, Shatin HK
| Patent application number | Description | Published |
|---|---|---|
| 20090293604 | MULTI-CHIP PACKAGE - Subject matter disclosed herein may relate to packaging for multi-chip semiconductor devices as may be used, for example, in tire pressure monitoring systems. | 12-03-2009 |
Lydia Lap Wai Leung, Causeway Bay HK
| Patent application number | Description | Published |
|---|---|---|
| 20110192221 | VALVE WITH RADIATING STRUCTURE FOR A TIRE PRESSURE MONITORING SYSTEM - A valve for a tire pressure monitoring system in which the valve acts a coaxial conductor to transmit a signal to a receiver presented. A valve stem electrically isolated from a valve pin form the coaxial conductor. In a tire pressure monitoring system, a tire pressure measurement module is positioned inside a tire. In one embodiment, a conductive radiating structure is electrically connected or coupled to the valve pin to receive the tire pressure information signal and transmit it to a receiver. The above configuration further permits a rechargeable battery in the tire pressure measurement module to be recharged via the tire valve. The valve pin and valve stem, being electrically isolated from one another, are used as recharging paths for the battery. | 08-11-2011 |
Ming Kuen Leung, Fontan HK
| Patent application number | Description | Published |
|---|---|---|
| 20110010941 | NOSE HAIR TRIMMER WITH DUAL CUTTING EDGES - A nose hair trimmer with dual cutting edges which comprises a fixed blade with a plurality of teeth disposed on two opposite longitudinal sides thereof; a movable blade with a plurality of teeth disposed on two opposite longitudinal sides thereof, and the movable blade is driven by a driving unit to move in a linear reciprocating manner against the fixed blade so that the teeth on one side of the fixed blade and the teeth on one side of the movable blade cooperate with each other to define a first cutting edge, and the teeth on the other side of the fixed blade and the teeth on the other side of the movable blade cooperate with each other to define a second cutting edge; and a casing having a head portion in shape and size adapted to be inserted into a human nose, and the head portion is provided with two longitudinal openings disposed opposite to each other for exposing the first cutting edge and the second cutting edge respectively, so that the first cutting edge and the second cutting edge are positioned substantially parallel to a longitudinal axis of a nasal passage of a human nose when the head portion is inserted into the nose. | 01-20-2011 |
Pak Kin Leung, Kwai Chung HK
| Patent application number | Description | Published |
|---|---|---|
| 20090195088 | APPARATUS FOR GENERATING AMPLIFIED COOLING AIR FLOWS - A linear motor comprising a coil assembly and a magnet assembly is provided with a cooling apparatus which comprises a segmented air knife assembly. The segmented air knife assembly has a plurality of slot openings distributed along its length which is coupled to the linear motor and it is operative to discharge cooling air into a gap between the coil assembly and magnet assembly in a discharge direction. An inclined surface extends from the plurality of slot openings and slopes at an obtuse angle away from the discharge direction of the cooling air. Each slot opening is individually configured to discharge the cooling air in the discharge direction at a sufficient velocity so as to entrain atmospheric air along the inclined surface to amplify the cooling air that is so discharged. | 08-06-2009 |
Pui Yin Leung, Shatin HK
| Patent application number | Description | Published |
|---|---|---|
| 20090035844 | Mechanical cell wounder device and related method - Disclosed is a device and related method for biological manipulation. With greater particularity, disclosed is a novel device and method for uniform cellular manipulation with economies of scale and operational uniformity. The device and related method utilize a cellular wounder ( | 02-05-2009 |
Raymond S.p. Leung, Shatin HK
| Patent application number | Description | Published |
|---|---|---|
| 20110133011 | MULTIEND PACKAGE OF MULTIFILAMENT POLYESTER BICOMPONENT YARN - Included are multiend packages of multicomponent yarns, where the yarn is separable into individual ends upon unwinding. The multicomponent yarn may be a bicomponent yarn, such as a yarn including compositionally different polyesters in a side-by-side or eccentric sheath-core configuration. Uses of such multiend packages are also included. | 06-09-2011 |
Shun Kei Leung, New Territories HK
| Patent application number | Description | Published |
|---|---|---|
| 20080258637 | LIGHT EMITTING ELEMENT DRIVER AND CONTROL METHOD THEREFOR - A method of controlling a light emitting element to compensate for reduced brightness includes accumulating a power-on time of the light emitting element and adjusting a light emitting element driving signal in order to adjust the power supplied to the light emitting element dependent on the power-on time of the light emitting element. | 10-23-2008 |
Tik Shun Leung, Shatin HK
| Patent application number | Description | Published |
|---|---|---|
| 20110050120 | LIGHTING CONTROL SYSTEM AND LED LAMP - A lighting control system and an LED lamp for use with the lighting control system are provided. In one embodiment, the LED lamp includes a color LED including a red LED, a green LED, and a blue LED, and a lamp contact having a first contact section, a second contact section, and a third contact section, each of the first contact section, the second contact section, and the third contact section including a positive contact and a negative contact, wherein the first contact section is electrically connected to the red LED, the second contact section is electrically connected to the green LED, and the third contact section is electrically connected to the blue LED. The lighting control system may include an LED driver unit configured to provide independent electrical connection with each of the contact sections of the LED lamp. | 03-03-2011 |
Wa Hing Leung, Tin Shiu Wai HK
| Patent application number | Description | Published |
|---|---|---|
| 20090290349 | Non-Glare Reflective LED Lighting Apparatus with Heat Sink Mounting - A lighting apparatus using at least one light-emitting diode (“LED”), back-reflecting collection optics for LEDs, and an improved heat sink mounting apparatus which promotes efficient heat dissipation generated from the LED while minimizing light obstruction and glare. The lighting apparatus contains a main housing; a reflector disposed within the main housing, the reflector having a front side and a rear side; a top rim thermally coupled to one end of the main housing; a heat conducting body positioned to face the front side of the reflector, the heat conducting body comprising a heat pipe thermally coupled to the top rim; at least one light-emitting diode thermally coupled to the heat conducting body, the at least one light-emitting diode being positioned to face directly at the front side of the reflector so that light emitted from the at least one light-emitting diode is directed to the front side of the reflector. | 11-26-2009 |
Wai Yee Leung, Happy Valley HK
| Patent application number | Description | Published |
|---|---|---|
| 20090061419 | GENOMIC MARKERS OF HEPATITIS B VIRUS ASSOCIATED WITH HEPATOCELLULAR CARCINOMA - The present invention provides methods of predicting a pre-disposition of HBV-infected individuals to develop hepatacellular carcinoma (HCC). | 03-05-2009 |
Wallace W. Leung, Hong Kong, Sar HK
| Patent application number | Description | Published |
|---|---|---|
| 20080264259 | NANOFIBER FILTER FACEMASKS AND CABIN FILTERS - A filtration medium includes a fine filter layer having a plurality of nanofibers and a coarse filter layer having a plurality of microfibers attached to the fine filter layer. The coarse filter layer is positioned proximal to a direction of fluid flow, and the fine filter layer is positioned distal to the direction of fluid flow. | 10-30-2008 |
Wallace Woon-Fong Leung, Hung Hom HK
| Patent application number | Description | Published |
|---|---|---|
| 20080269570 | Medical device for delivering drug and/or performing physical therapy - Current methods of delivering drug usually require a certain degree of human intervention. For example, a doctor, a paramedic or a patient is required to inject insulin manually when the blood sugar level becomes low. This invention provides a medical device for use with a patient for performing at least one of the functions of delivering drug and performing physical therapy to the patient. The device of this invention includes a sensor for measuring at least one parameter from the patient, an analyzer for analyzing the parameter to determine appropriate function to be carried out on the patient by said medical device, and at least one actuator to perform at least one of the functions of delivering drug and performing physical therapy. | 10-30-2008 |
Wing Fai Leung, Wanchai HK
| Patent application number | Description | Published |
|---|---|---|
| 20080266080 | Wireless communication system - A wireless system for controlling electrical circuits within a building is disclosed. The system includes a plurality of monitor devices coupled to load circuits and configured to control the load circuits. The system also includes a master control device configured to remotely communicate with the monitor devices. The system is configured to manually or remotely control the load circuits based on input commands input from the monitor device or the master control device and/or media data captured or acquired from the monitor devices and/or the master control device. Preferably, the monitor devices includes an image capture unit and transmit images to the master control device. The monitor devices also preferably include a motion sensor for detecting motion in locations corresponding the monitor devices and controlling the load circuits based on the motion detected. The system operates as a lighting control system and a security system. | 10-30-2008 |
| 20090013583 | Method of and device for attracting aquatic life forms using an electromagnetic field generation - A device for simulating and/or attracting aquatic life forms is disclosed. The device includes an electromagnetic module for simultaneously generating alternating or pulsed electromagnetic fields and a pulsed light output from a light emitting diode. The electromagnetic module includes a dry battery that is activated when exposed electrodes of the dry battery are placed in contact with a common electrolyte, such as sea water. The electromagnetic module includes a control circuit with one or more application specific integrated circuits for converting an input voltage from the dry battery to an operating voltage sufficient to power the light emitting diode. In further embodiments of the invention, the device includes one or more removable jackets that resemble aquatic life-forms. | 01-15-2009 |
| 20100251595 | Method of and device for attracting aquatic life forms using bubble and sound formation in an aquatic environment - A device for simulating and/or attracting aquatic life forms is disclosed. The device includes an electromagnetic module with a dry battery that is activated when exposed electrodes of the dry battery are placed in contact with a common electrolyte, such as sea water. The dry battery generates gas bubbles and sound in an aquatic environment, which attracts the aquatic life forms. In further embodiments of the invention, the device includes one or more removable jackets with holes or vents that facilities a controllable release of the gas bubbles generated by the dry battery. | 10-07-2010 |
| 20110293968 | Starch-based battery system - The present invention is directed to a starch-based battery system. The starch-based battery system uses a rheological and replaceable starch gluten electrolyte that generates colloidal starch gel adhesive contacted with and/or attached on electrodes to generate current for powering electronic devices. The starch-based battery system that includes control circuit and standard cap module replaces a conventional dry cell battery or is integrated with electronic devices to power, for example, flash-light, lighting ornaments or magnetic actuated motion products and toys. In other embodiments of the invention, the starch-based battery system is integrated into a device for attracting aquatic life forms in an aquatic environment, wherein the starch-based battery powers a light source and/or sound source and also the starch gluten electrolyte acts as bait for attracting aquatic life forms within the aquatic environment. | 12-01-2011 |
Wing Hong Leung, Kwai Chung HK
| Patent application number | Description | Published |
|---|---|---|
| 20100125348 | VISION SYSTEM FOR POSITIONING A BONDING TOOL - An apparatus for correcting a positional offset of a bonding tool during bonding operations comprises a first fiducial mark and a second fiducial mark spaced from the first fiducial mark located on the bonding tool. A first imaging path emanates from the first fiducial mark and a second imaging path emanates from the second fiducial mark when the first and second fiducial marks are illuminated at a reference position. An optical system is positioned along the first and second imaging paths to view images of the first and second fiducial marks. A processor is operative to calculate a current position of the bonding tool and to compare it to a desired position so that the bonding tool's positional offset may be corrected by moving it to the desired position. | 05-20-2010 |
| 20110051124 | DIE BONDING PROCESS INCORPORATING INFRARED VISION SYSTEM - A method of aligning a die when the die is held with a circuit pattern on a first side of the die facing away from an infrared light source, wherein infrared light from the infrared light source is projected onto a second side of the die opposite to the first side such that the infrared light passes through a body of the die. From the second side of the die, an image of the infrared light reflected from the circuit pattern is detected and captured. Thereafter, an alignment of the die from the captured image of the die is determined. | 03-03-2011 |
Wing Pan Leung, Hong Kong HK
| Patent application number | Description | Published |
|---|---|---|
| 20120121085 | System and Method for Content Distribution with Broadcast Encryption - A content distribution method with broadcast encryption, comprising an encryption process that includes the computation of a ciphertext using a differential ciphertext generation method. The ciphertext needs to be recomputed whenever the subscriber set changes. The differential ciphertext generation method computes the new ciphertext by reusing previously preserved computational results of a previous ciphertext, thereby improving the efficiency of the system. A content distribution method with broadcast encryption also comprises a decryption process that includes the reconstruction of the encryption secret that is used for decrypting the encrypted content. A wide window point addition method is used in the encryption secret reconstruction. The wide window point addition method reuses previously preserved computational results of group-divided point additions of public parameters, thereby improving the efficiency of the system. A clustering solution with multiple instances of key server and entitlement server allows the expansion of user population in the content distribution network. | 05-17-2012 |
Yiutak Leung, Kwai Chung HK
| Patent application number | Description | Published |
|---|---|---|
| 20110174378 | Water draining pipe and draining method thereof - A water draining method comprises water draining adapted for roads, mountains, mountainsides, protective hillsides, retaining walls, grass slopes, airport runways, highways, football fields, grass slopes, stone dams, embankments, landfills, farms, irrigating and draining systems, characterized in that: a. installing receiving members in a pervious bed; b. arranging draining pipes in the receiving members; c. disposing draining ditches on one or two ends of a drain tube; d. drawing excessive water to the draining pipes by using drawing ports of the drain tube and draining the water into the draining ditch via an end portion of the drain tube. Thereby, the present invention allows to obtain rain collecting, impurities filtering, irrigating, draining, anti-leaking, and warning functions. | 07-21-2011 |
Yu Kei Leung, New Territories HK
| Patent application number | Description | Published |
|---|---|---|
| 20090114493 | LUGGAGE HAVING AN ANGULARLY RETRACTABLE HANDLE - Luggage having an angularly retractable handle includes: a main body; a mounting plate, positioned at a front wall of the main body; a pivot, positioned at the mounting wall; an angularly retractable handle, connected to the mounting plate by the pivot, wherein the angularly retractable handle rotates with respect to the front wall of the main body via the pivot; a plurality of first wheel carriers, fixed on the bottom of the main body; a plurality of second wheel carriers, positioned on the bottom of the main body in a rotatable way; and at least four wheels, respectively assembled on the first wheel carriers and second wheel carriers. | 05-07-2009 |