1
James T Walker: Composite display device for combining image data and method. Cromemco, Paul Hentzel, February 23, 1982: US04317114 (115 worldwide citation)

A set of overlay images are established within a stack of memory maps for superpositioning over a host image on a raster display. The overlay images include legends, grids, cursors, graphs, formats, etc. which are primarily empty background with few actual image pixels. Overlay conflict between corr ...


2
Raymond S Larsen, James T Walker: 10 Gigasample/sec two-stage analog storage integrated circuit for transient digitizing and imaging oscillography. Analytek, Flehr Hohbach Test Albritton & Herbert, May 1, 1990: US04922452 (99 worldwide citation)

An analog integrated circuit is disclosed using integrated field effect transistor technology comprising a plurality of sampling and storage cells. A two-stage sampling cell design is used. The first stage incorporates a very small capacitor coupled to the input signal through a high speed gate. Thi ...


3
James T Walker, Marvin L Kausch: Video overlay image processing apparatus. Robert K Stoddard, September 4, 1990: US04954970 (94 worldwide citation)

A predominatly hardware-based system for rapidly generating overlay images by painting techniques using a host computer with appropriate graphics-generation operator interface, and for manipulating overlay images with respect to a background image. The system provides for rapid, convenient control o ...


4
Arjen Sundman, James T Walker: Optical contour digitizer. Amfit, Ohlandt Greeley Ruggiero & Perle L, March 20, 2001: US06205230 (31 worldwide citation)

The invention includes both a method and apparatus for measuring the shape of a surface of an object, such as a human foot. The apparatus includes a support for holding a compliant sheet of known color and retro-reflectivity. The compliant sheet conforms to the shape of the undersurface of the foot. ...


5
James T Walker: DC power converter having bipolar output and bi-directional reactive current transfer. Supertex, Harry M Weiss, Jeffrey D Moy, Weiss & Moy P C, October 16, 2001: US06304461 (29 worldwide citation)

A dc power converter having bipolar output and bi-directional reactive current transfer is disclosed. The dc power converter comprises: a direct current source; a modulator coupled to the direct current source, the modulator comprising at least two switch means for generating a waveform pulse; a tra ...


6
James T Walker: Transition data image processor. Cromemco, Paul Hentzel, December 14, 1982: US04364037 (27 worldwide citation)

Edge data codes forming an image to be displayed are entered into a random access memory map at addresses corresponding to the scanline number and pixel number of the edge in the display of the image. The edge codes may be entered into the memory map in any sequence (i.e. the sequence of availabilit ...


7
James T Walker, Jimes Lei: High-speed logic signal level shifter. Supertex, Jeffrey D Moy, Weiss & Moy P C, July 21, 2009: US07564263 (16 worldwide citation)

A high speed logic signal level shifter is comprised of: a logic signal buffer for receiving logic signal information and having true and complement state differential outputs; a binary flip-flop circuit with set and reset inputs; a first coupling capacitor connected from the true buffer output to t ...


8
James T Walker, Christopher I Walker: Electrostatic sensor device and matrix. Amfit, Ohlandt Greeley Ruggiero & Perle L, March 28, 2006: US07019529 (6 worldwide citation)

A system for electrostatically measuring the shape or pattern of objects including an array of sensor devices having the capability of responding, due to variable electrostatic coupling, to produce differentiated output signals when a sensor element forming part of each device is present and when it ...


9
James T Walker, Christopher I Walker: Electrostatic sensor device and matrix. Amfit, Ohlandt Greeley Ruggiero & Perle L, March 8, 2005: US06864687 (6 worldwide citation)

A system for electrostatically measuring the shape or pattern of objects including an array of sensor devices having the capability of responding, due to variable electrostatic coupling, to produce differentiated output signals when a sensor element forming part of each device is present and when it ...


10
James T Walker: Dimmable electrolumanescent lamp drivers and method therefor. Supertex, Jeffrey D Moy, Harry M Weiss, Weiss Moy & Harris P C, January 11, 2005: US06841950 (5 worldwide citation)

A method for dimmable control of a multiple output EL lamp driver is disclosed. The multiple output EL lamp driver has a power converter. A plurality of EL lamps are provided wherein one terminal of each EL lamp is coupled to a single common terminal. A plurality of half bridge circuits are provided ...