Assignee
SUMMAGRAPHICS CORP
US·66 granted patents·2,325 citations·filing 1974–1995
Top patents by PatentIndex Score
66 records- 0199USD284084SDigitizerSUMMAGRAPHICS CORP·Filed 1983·Granted Jun 3, 1986·525 cites·1 claims
- 0288USD327476SDigitizing stylusSUMMAGRAPHICS CORP·Filed 1989·Granted Jun 30, 1992·29 cites·1 claims
- 0387US5065145AMethod and apparatus for producing signals corresponding to the position of a cursorSUMMAGRAPHICS CORP·Filed 1989·Granted Nov 12, 1991·95 cites·12 claims
- 0485US4999462APosition determining and digitizing method and deviceSUMMAGRAPHICS CORP·Filed 1989·Granted Mar 12, 1991·82 cites·15 claims
- 0583US4081603APosition coordinate determination deviceSUMMAGRAPHICS CORP·Filed 1977·Granted Mar 28, 1978·54 cites·13 claims
- 0682US4936683AOptical tablet constructionSUMMAGRAPHICS CORP·Filed 1989·Granted Jun 26, 1990·57 cites·14 claims
- 0780US4794388AMethod of and apparatus for controlling a displaySUMMAGRAPHICS CORP·Filed 1982·Granted Dec 27, 1988·62 cites·36 claims
- 0879US4568182AOptical system for determining the position of a cursorSUMMAGRAPHICS CORP·Filed 1981·Granted Feb 4, 1986·36 cites·18 claims
- 0979US4018989APosition coordinate determination deviceSUMMAGRAPHICS CORP·Filed 1975·Granted Apr 19, 1977·43 cites·10 claims
- 1077US4786764ADigitizer stylus with pressure transducerSUMMAGRAPHICS CORP·Filed 1987·Granted Nov 22, 1988·65 cites·20 claims
- 1176US5369227AStylus switch status determination in a digitizer tablet having a cordless stylusSUMMAGRAPHICS CORP·Filed 1992·Granted Nov 29, 1994·94 cites·23 claims
- 1275US5383733ARibbon cassette for a printerSUMMAGRAPHICS CORP·Filed 1993·Granted Jan 24, 1995·34 cites·26 claims
- 1374US5214448ABelt-drive tensioning system which uses a pivoting memberSUMMAGRAPHICS CORP·Filed 1991·Granted May 25, 1993·32 cites·18 claims
- 1474US4952757ALow-power electromagnetic digitizer tabletSUMMAGRAPHICS CORP·Filed 1989·Granted Aug 28, 1990·49 cites·10 claims
- 1573US4857903AElectro-optical mouse with improved resolution for compensation of optical distortionSUMMAGRAPHICS CORP·Filed 1986·Granted Aug 15, 1989·49 cites·35 claims
- 1673US4482784APosition determination deviceSUMMAGRAPHICS CORP·Filed 1982·Granted Nov 13, 1984·44 cites·15 claims
- 1771US5581052APressure sensitive stylus having resiliently compressible tip elementSUMMAGRAPHICS CORP·Filed 1995·Granted Dec 3, 1996·72 cites·13 claims
- 1871US5267802ARibbon cassette storage and transfer apparatus for a printerSUMMAGRAPHICS CORP·Filed 1992·Granted Dec 7, 1993·30 cites·19 claims
- 1970USD280725SCursorSUMMAGRAPHICS CORP·Filed 1983·Granted Sep 24, 1985·10 cites·1 claims
- 2069USD320787SDigitizing stylusSUMMAGRAPHICS CORP·Filed 1989·Granted Oct 15, 1991·12 cites·1 claims
- 2168US5004872ADigitizer tablet with pressure stylusSUMMAGRAPHICS CORP·Filed 1989·Granted Apr 2, 1991·38 cites·22 claims
- 2267US5267401AMethod and apparatus for gauging reel diameters in a reel-to-reel sheet material transport systemSUMMAGRAPHICS CORP·Filed 1992·Granted Dec 7, 1993·17 cites·23 claims
- 2367US5004871ADigitizer stylus having side switchSUMMAGRAPHICS CORP·Filed 1989·Granted Apr 2, 1991·34 cites·27 claims
- 2466US4943689ABacklit digitizer tabletSUMMAGRAPHICS CORP·Filed 1989·Granted Jul 24, 1990·36 cites·15 claims
- 2564US4992630ADigitizer tablet with user customization of stylus proximity and pressureSUMMAGRAPHICS CORP·Filed 1989·Granted Feb 12, 1991·39 cites·17 claims
- 2664US4514688ADigital tablet system with calibration meansSUMMAGRAPHICS CORP·Filed 1980·Granted Apr 30, 1985·31 cites·21 claims
- 2763US4831566AMethod and apparatus for calibration of a charge ratio digitizerSUMMAGRAPHICS CORP·Filed 1987·Granted May 16, 1989·36 cites·24 claims
- 2863US4807166AMethod and apparatus for calibrating an electro-optical mouseSUMMAGRAPHICS CORP·Filed 1986·Granted Feb 21, 1989·33 cites·12 claims
- 2959US5111005AGraphics tablet with n-dimensional capabilitySUMMAGRAPHICS CORP·Filed 1990·Granted May 5, 1992·35 cites·25 claims
- 3058US5001306ADistributed optical fiber device for digitizer tabletSUMMAGRAPHICS CORP·Filed 1990·Granted Mar 19, 1991·34 cites·26 claims
- 3157US4977315ALiquid crystal position determining system and wand deviceSUMMAGRAPHICS CORP·Filed 1989·Granted Dec 11, 1990·23 cites·11 claims
- 3256US5066833ALow power sensing apparatus for digitizer tabletsSUMMAGRAPHICS CORP·Filed 1990·Granted Nov 19, 1991·30 cites·19 claims
- 3355US5153386ADigitizer tablet with illuminable working surfaceSUMMAGRAPHICS CORP·Filed 1991·Granted Oct 6, 1992·29 cites·28 claims
- 3454US5229551AHysteresis compensation for a digitizer tabletSUMMAGRAPHICS CORP·Filed 1991·Granted Jul 20, 1993·27 cites·22 claims
- 3553US5303624AApparatus for cutting sheet mediaSUMMAGRAPHICS CORP·Filed 1992·Granted Apr 19, 1994·18 cites·1 claims
- 3651USD358601SRibbon cassette for a printerSUMMAGRAPHICS CORP·Filed 1993·Granted May 23, 1995·7 cites·1 claims
- 3751US5416280ADigitizer tablet using relative phase detectionSUMMAGRAPHICS CORP·Filed 1993·Granted May 16, 1995·24 cites·27 claims
- 3851US5101487AMethod for retrieving compressed data from a memory storing a look-up tableSUMMAGRAPHICS CORP·Filed 1989·Granted Mar 31, 1992·18 cites·5 claims
- 3951US4788386AMenu for a charge ratio digitizerSUMMAGRAPHICS CORP·Filed 1987·Granted Nov 29, 1988·22 cites·25 claims
- 4049USD322250SDigitizing stylusSUMMAGRAPHICS CORP·Filed 1989·Granted Dec 10, 1991·5 cites·1 claims
- 4148US5051545ADigitizer with serpentine conductor grid having non-uniform repeat incrementSUMMAGRAPHICS CORP·Filed 1990·Granted Sep 24, 1991·21 cites·66 claims
- 4247US5405205ASheet medium transport system, particularly for printers and plottersSUMMAGRAPHICS CORP·Filed 1994·Granted Apr 11, 1995·10 cites·14 claims
- 4347US5157227ADigitizer tablet with regional error correctionSUMMAGRAPHICS CORP·Filed 1991·Granted Oct 20, 1992·26 cites·19 claims
- 4446US5280309ASingle degree of freedom belt drive tensioning system for a plotter apparatusSUMMAGRAPHICS CORP·Filed 1991·Granted Jan 18, 1994·12 cites·24 claims
- 4546US5061828ADigitizer stylus with Z-axis side pressure controlSUMMAGRAPHICS CORP·Filed 1990·Granted Oct 29, 1991·18 cites·10 claims
- 4645US4689448ATwo-dimensional position coordinate determination device with U-shaped delay lineSUMMAGRAPHICS CORP·Filed 1985·Granted Aug 25, 1987·15 cites·19 claims
- 4744US4368351AAmplitude modulated digitizerSUMMAGRAPHICS CORP·Filed 1981·Granted Jan 11, 1983·19 cites·4 claims
- 4843US5210380ADigitizer with serpentine-type conductor grid having uniform conductor repeat incrementsSUMMAGRAPHICS CORP·Filed 1991·Granted May 11, 1993·15 cites·39 claims
- 4943US5014044AMagnification assembly for digitizer cursorSUMMAGRAPHICS CORP·Filed 1988·Granted May 7, 1991·15 cites·23 claims
- 5042US3956588ADigitizing graphic system using magnetostrictive transducersSUMMAGRAPHICS CORP·Filed 1974·Granted May 11, 1976·13 cites·20 claims
Showing the top 50 of 66 patent records by PatentIndex Score.
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