Giridhar
Archit Giridhar, Singapore SG
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20140057808 | DEFORMABLE POLYMER TESTING DEVICE - A testing device uses a selectively deformable substrate to capture and retain spherical beads for genetic experimentation. A method of fabricating the device is described in which a silicon substrate can be coated with a photosensitive, bio-compatible polymer for photolithographic patterning using a single mask exposure. The polymer is patterned with a matrix of wells, each well capable of expansion to accept placement of a bead in the well, and contraction to secure the bead in the well. The polymer can exhibit piezoelectric properties that cause it to respond mechanically to a selected electrical excitation. | 02-27-2014 |
20140069513 | MICROFLUIDIC DEVICE WITH BENDABLE MEMBRANE HAVING VALVE PASSAGEWAYS TO PROVIDE ENHANCED FLUIDIC MOBILITY CONTROL AND RELATED METHODS - A microfluidic device may include a substrate having a cavity therein, and a bendable membrane within the cavity and having a plurality of spaced apart valve passageways therein. The bendable membrane may be bendable between a first position with the valve passageways being opened, and a second position with the valve passageways being closed. The microfluidic device may further include an actuator configured to bend the bendable membrane between the first and second positions. | 03-13-2014 |
20150253271 | MICROELECTRONIC FLUID DETECTOR - A resistive microelectronic fluid sensor implemented as an integrated voltage divider circuit can sense the presence of a fluid within a fluid reservoir, identify the fluid, and monitor fluid temperature or volume. Such a sensor has biomedical, industrial, and consumer product applications. After fluid detection, the fluid can be expelled from the reservoir and replenished with a fresh supply of fluid. A depression at the bottom of the sample reservoir allows a residual fluid to remain undetected so as not to skew the measurements. Electrodes can sense variations in the resistivity of the fluid, indicating a change in the fluid chemical composition, volume, or temperature. Such fluctuations that can be electrically sensed by the voltage divider circuit can be used as a thermal actuator to trigger ejection of all or part of the fluid sample. | 09-10-2015 |
Archit Giridhar, Tamilnadu IN
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20100257933 | MULTI-AXIAL LINEAR AND ROTATIONAL DISPLACEMENT SENSOR - A MEMS multiaxial inertial sensor of angular and linear displacements, velocities or accelerations has four comb drive capacitive sensing elements ( | 10-14-2010 |
Arun V. Giridhar, West Lafayette, IN US
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20100025221 | PROCESS FOR DISTILLATION OF MULTICOMPONENT MIXTURES INTO FIVE PRODUCT STREAMS - Novel distillation processes for reducing the heat duty requirement of petroleum crude distillation as compared to the conventional distillation process are described. These processes are also applicable for distillation of other multi-component mixtures similar to petroleum crude. | 02-04-2010 |
Bharan Giridhar, Ann Arbor, MI US
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20150015305 | DYNAMIC CIRCUITRY USING PULSE AMPLIFICATION TO REDUCE METASTABILITY - Synchronisation circuitry | 01-15-2015 |
20150146475 | MEMORY SENSE AMPLIFIER WITH MULTIPLE MODES OF OPERATION - Memory circuitry comprising an array of 6T bit cells | 05-28-2015 |
20150155014 | MEMORY CIRCUITRY INCLUDING READ VOLTAGE BOOST - Memory circuitry | 06-04-2015 |
Chetan Jayant Giridhar, Bangalore IN
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20150261465 | SYSTEMS AND METHODS FOR STORAGE AGGREGATES AND INFINITE STORAGE VOLUMES - A method of storing data to an aggregate storage system including: receiving data at the aggregate storage system, wherein the aggregate storage system includes a random-access storage component and a sequential-access storage component, and wherein the data includes one or more data portions and one or more metadata portions; identifying each portion of the data as either one of the data portions or one of the metadata portions; in response to determining that one of the metadata portions is identified, writing the metadata portion to the random-access storage component and the sequential-access storage component; and in response to determining that one of the data portions is identified, writing the data portion only to the sequential-access storage component. | 09-17-2015 |
Giri Giridhar, Farmington Hills, MI US
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20080238112 | TRIM PANEL TETHER AND METHOD - A trim panel cover tether and method for use with interior trim cover panels or audio speakers grilles. A deformable tether strap is engaged with the trim panel substrate and the cover panel to deter undesirable rattles of the speaker grille and to prevent complete detachment of the cover panel from the trim panel substrate in the event the cover panel is dislodged from the substrate. | 10-02-2008 |
Kamesh Giridhar, Bangalore Karnataka IN
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20090201722 | METHOD INCLUDING MAGNETIC DOMAIN PATTERNING USING PLASMA ION IMPLANTATION FOR MRAM FABRICATION - A method for defining magnetic domains in a magnetic thin film on a substrate, includes: coating the magnetic thin film with a resist; patterning the resist, wherein areas of the magnetic thin film are substantially uncovered; and exposing the magnetic thin film to a plasma, wherein plasma ions penetrate the substantially uncovered areas of the magnetic thin film, rendering the substantially uncovered areas non-magnetic. A tool for this process comprises: a vacuum chamber held at earth potential; a gas inlet valve configured to leak controlled amounts of gas into the chamber; a disk mounting device configured to (1) fit within the chamber, (2) hold a multiplicity of disks, spacing the multiplicity of disks wherein both sides of each of the multiplicity of disks is exposed and (3) make electrical contact to the multiplicity of disks; and a radio frequency signal generator electrically coupled to the disk mounting device and the chamber, whereby a plasma can be ignited in the chamber and the disks are exposed to plasma ions uniformly on both sides. This process may be used to fabricate memory devices, including magnetoresistive random access memory devices. | 08-13-2009 |
Kamesh Giridhar, Bangalore IN
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20160111305 | APPARATUS FOR ADJUSTABLE LIGHT SOURCE - Apparatus for adjusting the position of lamp modules of a processing chamber are disclosed herein. Implementations generally include a process chamber comprising an enclosure defining an internal volume, a substrate support disposed in the internal volume of the process chamber, and a plurality of adjustable lamp modules. Each adjustable lamp module can include a radiation source, a lamp connector in connection with the radiation source, an adjustable mounting bracket connected to the lamp connector, the adjustable mounting bracket being pivotably connected to the process chamber; and a adjustable force device mounted in connection with the adjustable mounting bracket. | 04-21-2016 |
Krishnamurthi Giridhar, Chennai IN
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20110110304 | Methods and Systems for Interference Mitigation - Embodiments herein provide methods and systems for enhancing interference mitigation using conjugate symbol repetition and phase randomization on a set of subcarriers. The repeated data tone in the signal is complex-conjugated before transmission, when the repetition factor is two. When the repetition factor is greater than two, a combination of conjugate repetition and random/deterministic phase variation of the repeated tones is used to mitigate the interference mitigation. Embodiments further disclose Collision Free Interlaced Pilot PRU Structures that can be used with or without conjugate symbol repetition and phase randomization for interference mitigation. | 05-12-2011 |
20110141876 | Precoding for Single Transmission Streams in Multiple Antenna Systems - Precoding for multiple transmission streams in multiple antenna systems. Disclosed herein is a general method that transmits signal from multiple antennas using a one/two dimensional precoder. This precoder is fixed in a given resource block (RB) or slot, which is composed of P subcarriers and Q OFDM symbols (where the values for P and Q are greater than or equal to 1). The precoder in each resource block may take same or different values, which span the two dimensional time-frequency grid. The precoder is chosen as a function of either logical frequency index or physical frequency index of the RB. | 06-16-2011 |
20110142003 | Precoding for Multiple Transmission Streams in Multiple Antenna Systems - Precoding for multiple transmission streams in multiple antenna systems. Embodiments herein disclose a general method that transmits signal from multiple antennas using a one/two dimensional precoder followed by STBC/SFBC or SM encoder. This precoder is fixed in a given resource block (RB) or slot, which is composed of P subcarriers and Q OFDM symbols (where the values for P and Q are greater than or 5 equal to 1). The precoder in each resource block may take same or different values, which span the two dimensional time-frequency grid. The precoder is chosen as a function of either logical frequency index or physical frequency index of the RB. | 06-16-2011 |
20120014476 | Pilot Aided Data Transmission and Reception with Interference Mitigation in Wireless Systems - Embodiments disclosed herein reduce interference at pilot symbols and also enable good interference measurements by using a combination pilot tones and null tones along with null tones. In this type of system, the receivers can estimate tile channel state information without any interference from the remaining transmitters and at the same time the receiver can measure either the individual interference channel states or the interference covariances from the silent periods. The groups of transmitters are reused in geographically separated region using a frequency reuse structure. In a preferred implementation, pilot signal is precoded using a multi-antenna precoder. The precoder may be same for pilot and data. | 01-19-2012 |
20130215826 | Robust Channel Estimation of OFDM Systems - A system and method for estimating a channel in wireless communication systems using Orthogonal Frequency Division Multiplexing (OFDM). From the received OFDM symbols, Maximum Likelihood (ML) estimate of the channel frequency response is obtained at the pilot locations. A hypothesis test is performed on the ML estimates and the outcome of the hypothesis test is used to decide a shrinkage target. Biased estimation methods are used to shrink the ML estimates towards the shrinkage target to obtain better estimates of the channel frequency response at the pilot locations and these estimates are interpolated using a Filter to get a set of complete estimates of the channel over the resource block. The Filter is an Empirical Weiner Filter or a robust 2D-MMSE filter and the biased estimation is done using either a James-Stein (JS) estimator or a shrinkage estimator or an empirical Bayes estimator. | 08-22-2013 |
20150215063 | PILOT AIDED DATA TRANSMISSION AND RECEPTION WITH INTERFERENCE MITIGATION IN WIRELESS SYSTEMS - Embodiments disclosed herein reduce interference at pilot symbols and also enable good interference measurements by using a combination pilot tones and null tones along with null tones. In this type of system, the receivers estimate the channel state information without any strong interference from the neighboring transmitters, and at the same time it can also measure either the individual interference channel states or the interference covariances from the silent periods. It uses these measurements thus obtained to calculate the post processing SINR, and then compute and report the wideband and subband CQIs to the transmitter. The groups of transmitters are reused in geographically separated region using a frequency reuse structure. In a preferred implementation, pilot signal is precoded using a multi-antenna precoder. The precoder may be same for pilot and data. | 07-30-2015 |
20150271003 | PRECODING FOR SINGLE TRANSMISSION STREAMS IN MULTIPLE ANTENNA SYSTEMS - Precoding for multiple transmission streams in multiple antenna systems. Disclosed herein is a general method that transmits signal from multiple antennas using a one/two dimensional precoder. This precoder is fixed in a given resource block (RB) or slot, which is composed of P subcarriers and Q OFDM symbols (where the values for P and Q are greater than or equal to 1). The precoder in each resource block may take same or different values, which span the two dimensional time-frequency grid. The precoder is chosen as a function of either logical frequency index or physical frequency index of the RB. | 09-24-2015 |
Krishnamurthy Giridhar, Chennai IN
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20130101062 | Interference Cancelling Block Modulation - Embodiments herein disclose an Interference Cancelling Block Modulation (ICBM), a new open-loop precoding scheme where each transmitter is assigned with a predetermined precoder which facilitates interference cancellation at the receivers. Only a finite set of precoders will be used, and they will be assigned to each transmitter in a pre-determined manner. Usually, interfering transmitters located adjacent to each other will have different precoders, and the same precoder can be reused by non-adjacent transmitters. The precoders are represented by N×K matrices and they expand the symbols in time and/or frequency by a factor of N/K while providing precoded sequences with low cross-correlation properties. | 04-25-2013 |
Lakshminarayana Giridhar, Bangalore IN
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20110075954 | RECLOSABLE PACKAGE - A flexible package has a reclosing function. The package has a first panel and a second panel sealed to each other along their perimeters to form a sealed perimeter surrounding an interior storage space. The sealed perimeter has an upper seal, a bottom seal, a first side seal, and a second side seal opposite the first side seal. The first side seal and the second side seal both connect to the upper seal and the bottom seal. A spout is formed in the sealed perimeter when the package is open along at least a portion of the upper seal. A discharge channel leads from the spout through the upper seal to the interior storage space. A first recess is along the second side seal; and a second recess is along the upper seal opposite the discharge channel from the first recess. The first recess can engage the second recess such that a fold line is formed that intersects the discharge channel to close the discharge channel. | 03-31-2011 |
Murali Giridhar, Sunnyvale, CA US
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20130343605 | SYSTEMS AND METHODS FOR TRACKING HUMAN HANDS USING PARTS BASED TEMPLATE MATCHING - Systems and methods for tracking human hands using parts based template matching are described. One embodiment of the invention includes a processor, a reference camera and memory containing: a hand tracking application; and a finger template including an edge features template. In addition, the hand tracking application configures the processor to: detect at least one candidate finger in a frame of video data received from the reference camera, where each candidate finger is a grouping of pixels identified by searching the frame of video data for a grouping of pixels that have image gradient orientations that match the edge features of the finger template accounting for rotation and scaling differences; and verify the correct detection of a candidate finger by confirming that the colors of the pixels within the grouping of pixels identified as a candidate finger satisfy a skin color criterion. | 12-26-2013 |
20130343606 | SYSTEMS AND METHODS FOR TRACKING HUMAN HANDS BY PERFORMING PARTS BASED TEMPLATE MATCHING USING IMAGES FROM MULTIPLE VIEWPOINTS - Systems and methods for tracking human hands by performing parts based template matching using images captured from multiple viewpoints are described. One embodiment of the invention includes a processor, a reference camera, an alternate view camera, and memory containing: a hand tracking application; and a plurality of edge feature templates that are rotated and scaled versions of a finger template that includes an edge features template. In addition, the hand tracking application configures the processor to: detect at least one candidate finger in a reference frame, where each candidate finger is a grouping of pixels identified by searching the reference frame for a grouping of pixels that have image gradient orientations that match one of the plurality of edge feature templates; and verify the correct detection of a candidate finger in the reference frame by locating a grouping of pixels in an alternate view frame that correspond to the candidate finger. | 12-26-2013 |
Raghupathy Giridhar, San Jose, CA US
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20090035584 | METHODS FOR DEVICE FABRICATION USING PITCH REDUCTION AND ASSOCIATED STRUCTURES - Embodiments of a method for device fabrication by reverse pitch reduction flow include forming a first pattern of features above a substrate and forming a second pattern of pitch-multiplied spacers subsequent to forming the first pattern of features. In embodiments of the invention the first pattern of features may be formed by photolithography and the second pattern of pitch-multiplied spacers may be formed by pitch multiplication. Other methods for device fabrication are provided. | 02-05-2009 |
Sathyanarayana Giridhar, Palo Alto, CA US
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20140082744 | AUTOMATIC SHARING OF USER INTERACTIONS - The subject disclosure relates to a method comprising steps for receiving reference object information, wherein the reference object information is based on a first user's interaction with a content item, determining that a second user is interacting with the content item, receiving item object information, wherein the item object information is based on the second user's interaction with the content item and determining that the second user has access rights to the reference object information based on the second user and the second user's interaction with the content item. In certain aspects, the method can further comprise steps for providing at least a portion of the reference object information for an electronic device associated with the second user. Systems and computer-readable media are also provided. | 03-20-2014 |
Thota Giridhar, Hyderabad IN
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20110092719 | Preparation of Escitalopram, Its Salts and Intermediates - The present patent application relates to an improved process for the preparation of escitalopram, its salts and intermediates. It also relates to a novel crystalline form S of citalopram diol intermediate, process for preparation and its use in the preparation of citalopram, escitalopram and their salts. | 04-21-2011 |
20110230666 | PROCESS FOR THE SEPARATION OF ENANTIOMERICALLY PURE COMPOUNDS - The present patent application relates to an improved process for the separation of enantiomerically pure compounds. Specifically it relates to separation of enantiomerically enriched Rivastigmine, Duloxetine, Escitalopram and their intermediates in high yields. | 09-22-2011 |