Inventors list |
Assignees list |
Classification tree browser |
Top 100 Inventors |
Top 100 Assignees |
Carlson, VA
Daniel Carlson, Concord, VA US
| Patent application number | Description | Published |
|---|---|---|
| 20090090880 | Power Generation for Valve Actuators - The present invention utilizes operation of a valve actuator to generate electrical power. A portion of the mechanical energy generated by operation of a valve actuator is converted to electrical energy. The mechanical energy may be converted to electrical energy at the same time as the valve actuator is operating or the mechanical energy may be stored for later conversion. A valve actuator may be operated manually, electrically, pneumatically, or hydraulically. Generated electrical energy may also be stored. | 04-09-2009 |
David E. Carlson, Williamsburg, VA US
| Patent application number | Description | Published |
|---|---|---|
| 20100084009 | Solar Cells - A photovoltaic cell comprising a semiconductor wafer comprising a front, light receiving surface and an opposite back surface, a passivation layer on at least the back surface, a doped layer opposite in conductivity type to the wafer over the passivation layer, an induced inversion layer, a dielectric layer over the doped layer, and one or more localized emitter contacts and one or more localized base contacts on at least the back surface extending at least through the dielectric layer; and a neutral surface photovoltaic cell comprising a semiconductor wafer comprising a front, light receiving surface and an opposite back surface, neutral passivation layer on at least the back surface, a dielectric layer over the passivation layer, and one or more localized emitter contacts and one or more localized base contacts on at least the back surface extending at least through the dielectric layer. | 04-08-2010 |
| 20100140558 | Apparatus and Method of Use for a Top-Down Directional Solidification System - This invention relates to an apparatus and a method of use for a top-down directional solidification system, such as for casting solar grade silicon. The invention includes a vessel with a pressure relieving device to prevent pressure build up in the liquid as the solidification front advances from a downward direction. The invention also includes a drain to remove impurities, such as the concentration in the remaining liquid phase as casting nears completion. | 06-10-2010 |
| 20100243041 | Apparatus and Method for Solar Cells with Laser Fired Contacts in Thermally Diffused Doped Regions - This invention relates to an apparatus and a method for solar cells with laser fired contacts in thermally diffused doped regions. The cell includes a doped wafer and a plurality of first highly doped regions having a first conductivity type. The cell also includes a plurality of second highly doped regions having an opposite conductivity type from the first conductivity type and a passivation layer disposed over at least a portion of each the plurality of first highly doped regions and the plurality of second highly doped regions. The cell also includes a network of conductors having a first conductor and a second conductor, and a plurality of contacts electrically connecting the first highly doped regions with the first conductor and electrically connecting the second highly doped regions with the second conductor. | 09-30-2010 |
David Emil Carlson, Williamsburg, VA US
| Patent application number | Description | Published |
|---|---|---|
| 20090314332 | HIGH EFFICIENCY SOLAR CELL - This invention relates to a high efficiency solar cell with a novel architecture. In one embodiment, the solar cell is comprised of a high energy gap cell stack and a dichroic mirror. The high energy gap cell stack is exposed to solar light before there is any splitting of the solar light into spectral components. Each cell in the high energy gap cell stack absorbs the light with photons of energy greater than or equal to its energy gap, i.e., the blue-green to ultraviolet portion of the solar light. Each cell in the high energy gap cell stack is transparent to and transmits light with photons of energy less than its energy gap. Spectral splitting is then performed by means of the dichroic mirror on the remaining light, i.e., the light transmitted by the high energy gap cell stack. | 12-24-2009 |
| 20110061726 | HIGH EFFICIENCY SOLAR CELL - This invention relates to a high efficiency solar cell with a novel architecture. In one embodiment, the solar cell is comprised of a high energy gap cell stack and a dichroic mirror. The high energy gap cell stack is exposed to solar light before there is any splitting of the solar light into spectral components. Each cell in the high energy gap cell stack absorbs the light with photons of energy greater than or equal to its energy gap, i.e., the blue-green to ultraviolet portion of the solar light. Each cell in the high energy gap cell stack is transparent to and transmits light with photons of energy less than its energy gap. Spectral splitting is then performed by means of the dichroic mirror on the remaining light, i.e., the light transmitted by the high energy gap cell stack. | 03-17-2011 |
Eric P. Carlson, Christiansburg, VA US
| Patent application number | Description | Published |
|---|---|---|
| 20110014778 | Boron-10 coating process for neutron detector integrated circuit with high aspect ratio trenches - A coating process to infill high aspect-ratio vias and trenches in semiconductor substrates with dense boron for the production of neutron detectors and other devices uses a vacuum cathodic arc or other source of fully ionized boron plasma. Biasing of the substrate is used to impart energies to the plasma ions directing them toward the substrate, while repulsing the electrons. The full ionization produced by the source allows control of the energies of the boron ions by means of the bias voltage. The bias is alternated between coating deposition at low ion energies and sputtering of already coated material by energetic ions. Most of the sputtered material comes off the substrate top surface and between the trenches or vias and much of it is redeposited, thereby contributing to the infill. The process is suitable for carbon, boron or similar light elements, and is of particular interest for | 01-20-2011 |
John Carlson, Herndon, VA US
| Patent application number | Description | Published |
|---|---|---|
| 20100020701 | Method and apparatus for determining coupled path loss - The disclosure generally relates to method and apparatus for determining coupled path loss in a small geographical which is served by a plurality of transmitters and is subject to broad signal level variation. In one embodiment, the disclosure relates to a method for determining performance of a signal received by a wireless device located within a bin of a cell of a cellular communication system. The method comprises determining the value of the received signal level as a function of the sum of the signal levels received from a primary base station at a primary cell divided by a number of signal level measurements from said primary base station. | 01-28-2010 |
John Peter Carlson, Dulles, VA US
| Patent application number | Description | Published |
|---|---|---|
| 20090149171 | Method and Apparatus for Determining Path Loss by Active Signal Detection - In one embodiment, the disclosure relates to a method for determining a path loss value of a signal transmitted from a wireless device and received by a receiver, where the wireless device and the receiver operate within a wireless communication system having at least one cell having at least one sector operating on at least one frequency channel. The method includes: (i) identifying a geographic area where the path loss value is to be determined; (ii) identifying a first cell, a first sector, and a first frequency channel associated with the geographic area wherein said wireless device is actively communicating with said receiver using said first frequency channel; (iii) receiving at said receiver the signal transmitted from said wireless device on said first frequency channel; (iv) receiving at said receiver an indication of transmission signal strength of said signal; (v) measuring at said receiver the received signal strength of said signal; and (vi) determining the path loss value of said first frequency channel as a function of the indication of transmission signal strength and the received signal strength. | 06-11-2009 |
| 20110230206 | SYSTEM AND METHOD FOR SINGLE SENSOR GEOLOCATION - A system and method for determining a position of a wireless mobile device. The method comprising the steps of providing one base station in communication with the mobile device, providing a sensor spaced apart a known distance from the base station, and determining the range between the mobile device and the base station. The time of arrival of a signal transmitted from the mobile device is measured at the sensor and a set of coordinates is calculated for the mobile device relative to the sensor as a function of the known distance from the sensor to the base station, the range between the mobile device and the base station, an estimate of base station transmission timing relative to a time source, and the time of arrival. One of the set of coordinates may then be chosen to thereby determine a position of the mobile device relative to the sensor. | 09-22-2011 |
John Peter Carlson, Herndon, VA US
| Patent application number | Description | Published |
|---|---|---|
| 20100120413 | METHOD AND SYSTEM FOR APPLYING WIRELESS GEOLOCATION TECHNOLOGY - A system and method for determining the positioning of mobile-appliance location determining sensors in a mobile-appliance communications network by estimating the positioning accuracy of the sensors. | 05-13-2010 |
| 20110034122 | System and Method of Operation For Network Overlay Geolocation System With Repeaters - A novel system and method for a network overlay geolocation system operating in a host wireless communication system with repeaters is disclosed. Embodiments of the novel system and method enable wireless communication system to determine if signals being received by system receivers arrive directly from a target mobile appliance or if the signals are passing through a repeater. The system's determination may be based at least in part on the TA of the signal, the power of the received signal, the power of the transmitted signal, the hearability of the signal at system receivers, the hearability of system transmitters at the mobile and the known delays associated with the repeaters. Embodiments of the novel system and method provide a more accurate geolocation of mobiles served by repeater stations than capable in the prior art. | 02-10-2011 |
Timothy J. Carlson, Arlington, VA US
| Patent application number | Description | Published |
|---|---|---|
| 20120118848 | MODULAR INTERLOCKING CONTAINERS WITH ENHANCED LATERAL CONNECTIVITY FEATURES - Described are devices and containers that are scalable, modular, and lockable laterally and vertically with other like containers for a variety of applications. A container is formed by a wall attached at first end to a top end section with an opening and attached at a second end by a bottom end section. A container may have one or more of a tongue, formed on the wall, having and interconnecting mechanism to be received and interlocked by a groove. Vertical interconnectivity is accomplished with mechanisms to stack containers and prevent swivel using a ridge and channel interlocking arrangement. | 05-17-2012 |