CALCOMP TECHNOLOGY, INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5416280 Digitizer tablet using relative phase detectionExpiredApr 08, 93May 16, 95[G08C]
5369227 Stylus switch status determination in a digitizer tablet having a cordless stylusExpiredJul 22, 92Nov 29, 94[G08C]
5333005 Apparatus for raising and lowering plotter marking devicesExpiredJul 10, 91Jul 26, 94[G01D]
5303624 Apparatus for cutting sheet mediaExpiredMar 30, 92Apr 19, 94[B26D]
5280309 Single degree of freedom belt drive tensioning system for a plotter apparatusExpiredJun 11, 91Jan 18, 94[G01D]
5229551 Hysteresis compensation for a digitizer tabletExpiredNov 04, 91Jul 20, 93[G08C]
5214448 Belt-drive tensioning system which uses a pivoting memberExpiredJul 31, 91May 25, 93[G01D]
5194699 Digitizer tablet with fixed incremented grid portionsExpiredFeb 01, 91Mar 16, 93[G08C]
5157227 Digitizer tablet with regional error correctionExpiredJan 17, 91Oct 20, 92[G08C]
RE34095 Digitizer stylus with pressure transducerExpiredSep 17, 90Oct 13, 92[G08C]
D327476 Digitizing stylusExpiredFeb 13, 89Jun 30, 92[]
D322250 Digitizing stylusExpiredFeb 13, 89Dec 10, 91[]
D320787 Digitizing stylusExpiredFeb 13, 89Oct 15, 91[]
5028744 Digitizer with illuminable working surfaceExpiredJan 11, 90Jul 02, 91[G08C]
4992630 Digitizer tablet with user customization of stylus proximity and pressureExpiredJul 11, 89Feb 12, 91[G08C]
4988836 Digitizer tablet with integral storageExpiredJul 17, 89Jan 29, 91[G08C]
4977315 Liquid crystal position determining system and wand deviceExpiredOct 06, 89Dec 11, 90[G09G, G01V]
4952757 Low-power electromagnetic digitizer tabletExpiredNov 15, 89Aug 28, 90[G08C]
4943689 Backlit digitizer tabletExpiredJun 23, 89Jul 24, 90[G08C, G09F]
4928256 Digitizer for position sensingExpiredMar 16, 88May 22, 90[G08C, G01B]

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