1
Robert D Meadows: Touch panel with adaptive noise reduction. Tektronix, John D Winkelman, Mark M Meininger, October 1, 1991: US05053757 (175 worldwide citation)

A touch panel has panel scanning signals selectively applied to the four sides of a touch sensing surface of the panel so as to establish alternating current voltage gradients in desired directions across the touch sensing surface. When the panel is touched, touch signals result and are utilized by ...


2
R David Meadows, Roger J McCoy: Capacitive touch panel system with randomly modulated position measurement signal. Tektronix, John D Winkelman, Mark M Meininger, May 1, 1990: US04922061 (134 worldwide citation)

A capacitive touch panel system (10) having a faceplate (14) with an electrically conductive layer (20) of a consistent resistivity employs a position measurement apparatus (12) to generate an address signal indicative of a position (46) on the faceplate in contact with a stylus (48). The position m ...


3
Robert D Meadows, Roger J McCoy: Position measurement apparatus for capacitive touch panel system. Tektronix, John D Winkelman, Mark M Meininger, August 1, 1989: US04853498 (92 worldwide citation)

A capacitive touch panel system (10) having a faceplate (14) with an electrically conductive layer (20) of a consistent resistivity employs a position measurement apparatus (12) to generate an address signal indicative of a position (46) on the faceplate in contact with a stylus (48). The position m ...


4
Donald B MacLane, Ted E Deur, Jeffrey J Anderson, Donald R Titterington, James C Oswald, Richard S Meissner: Ink jet print head maintenance system. Tektronix, John D Winkelman, Mark M Meininger, February 2, 1993: US05184147 (57 worldwide citation)

An ink jet print head cleaning and maintenance system has a purge chamber for applying a vacuum to a nozzle orifice surface. A specialized baffle diverts ink entering the purge chamber away a vent port through which the vacuum is drawn. An elongated wipe engages and wipes the orifice surface and is ...


5
Roxanna F Rochat, Joann M Taylor, Novia A Weiman: Computer display color control and selection system. Tektronix, John D Winkelman, Mark M Meininger, August 2, 1994: US05334992 (43 worldwide citation)

An interface system allows a user to select and control colors used in graphic images generated by a computer system. The interface system employs graphical representations of the hue, chroma, and lightness combinations capable of being rendered by a computer graphics system. In a preferred embodime ...


6
Thomas S Buzak: Flat panel apparatus for addressing optical data storage locations. Tektronix, John D Winkelman, Mark M Meininger, July 30, 1991: US05036317 (40 worldwide citation)

A flat panel apparatus for and a method of addressing data storage locations (80) employs a row-scanning electron beam (76) to address simultaneously a row (120) of such storage locations and thereby store data in and read data out of them. The storage locations are defined by the overlapping areas ...


7
Richard W Stallkamp: Graphics display system having data transform circuit. Tektronix, Mark M Meininger, Robert S Hulse, May 2, 1989: US04827250 (40 worldwide citation)

A graphics display system (10) includes a display screen (14) on which images are formed and a data transform circuit (12) that provides transformations between model data representing the basic shape of an object and display data that are employed in the formation of an image of the object on the d ...


8
Terry J Ligocki, Peter A Borgwardt: Method and apparatus for rendering an image from data arranged in a constructive solid geometry format. Mark M Meininger, Robert S Hulse, December 19, 1989: US04888583 (26 worldwide citation)

A method and an apparatus render on a display screen (14) an image of a three-dimensional object. The object is represented by image data arranged in a constructive solid geometry format including at least one halfspace that divides an object space (28) into an interior region that lies inside the h ...


9
Daniel A Brokenshire: Stereoscopic graphics display system with multiple windows for displaying multiple images. Mark M Meininger, Robert S Hulse, October 17, 1989: US04875034 (23 worldwide citation)

A stereoscopic graphics display system (10) has a stereoscopic window controller (18) that generates multiple windows (72 and 74) within which multiple images (76 and 78) are formed. The stereoscopic window controller directs the graphics display system to render around each window a border (80 and ...


10
Arnold M Frisch: Bipolar-CMOS digital interface circuit. Tektronix, Mark M Meininger, Robert S Hulse, May 23, 1989: US04833350 (22 worldwide citation)

A bipolar-CMOS (Bi-CMOS) digital interface circuit (50) of the present invention provides an interface between a bipolar digital circuit (52) and a CMOS digital circuit (54). The digital interface circuit includes a digital transform circuit (56) that receives a bipolar logic signal generated by the ...