Assignee
CALCOMP INC
US99 patents
Top patents by PatentIndex Score
US5381160AJan 10, 1995
See-through digitizer with clear conductive grid
CALCOMP INC315 citations98
US4859813AAug 22, 1989
Digitizer tablet having electrical interconnect components on the writing substrate
CALCOMP INC173 citations98
US4827086AMay 2, 1989
Digitizer cursor coil for reducing edge effect
CALCOMP INC171 citations98
US5247138ASep 21, 1993
Cordless digitizer stylus status encoding and transmission scheme
CALCOMP INC88 citations96
US4806707AFeb 21, 1989
3-Dimensional digitizer pen
CALCOMP INC71 citations96
US4853499AAug 1, 1989
Ground switching technique for silkscreened digitizer grids
CALCOMP INC59 citations95
US5384688AJan 24, 1995
Three-dimensional circuits for digitizer and pen-based computer system pen cursors
CALCOMP INC24 citations92
US5373118ADec 13, 1994
Half normal frequency regime phase encoding in cordless digitizers
CALCOMP INC51 citations92
US5357061AOct 18, 1994
Digitizer tablet having high permeability grid shield
CALCOMP INC33 citations92
US5204823AApr 20, 1993
Method and apparatus for high-speed layer thickness curing in 3-D model making
CALCOMP INC34 citations92
US5198623AMar 30, 1993
Method for use in a digitizer for determining pen tilt
CALCOMP INC43 citations92
US4853497AAug 1, 1989
Shielding techique for digitizers
CALCOMP INC37 citations92
US4794208ADec 27, 1988
Frequency shifting digitizer for reducing AC fields interference
CALCOMP INC38 citations92
US4754288AJun 28, 1988
Pen carousel, pen sensing and indexing
CALCOMP INC25 citations92
US4734546AMar 29, 1988
Digitizer system with loopback conductor grid
CALCOMP INC53 citations92
US4939318AJul 3, 1990
Digitizer pen tilt correction employing wires near the data point
CALCOMP INC30 citations91
US5525981AJun 11, 1996
Cordless digitizer transducer/cursor status transmission apparatus and method
CALCOMP INC96 citations90
US5124509AJun 23, 1992
Digitizer with capacitive and inductive coupling
CALCOMP INC40 citations90
US5367934ANov 29, 1994
Media cutter mechanism
CALCOMP INC29 citations89
US5357062AOct 18, 1994
Pressure sensing apparatus for digitizer pen tip
CALCOMP INC53 citations89
US5287105AFeb 15, 1994
Automatic tracking and scanning cursor for digitizers
CALCOMP INC21 citations89
US5245363ASep 14, 1993
Pen cleaning system for a pen plotter
CALCOMP INC29 citations89
US5214293AMay 25, 1993
Latch status sensor sensing closed and unlatched position
CALCOMP INC21 citations89
US5045645ASep 3, 1991
Digitizer system with passive pointer
CALCOMP INC39 citations89
US4907014AMar 6, 1990
Safely retracting paper-cutting apparatus for a roll paper printer
CALCOMP INC35 citations89
US5710585AJan 20, 1998
Ink source for an ink delivery system
CALCOMP INC40 citations88
US5721577AFeb 24, 1998
Large capacity ink cartridge
CALCOMP INC21 citations87
US5719608AFeb 17, 1998
Constant flow ink delivery system
CALCOMP INC22 citations87
US5212888AMay 25, 1993
Dual function sensor for a pen plotter
CALCOMP INC22 citations87
US5854449ADec 29, 1998
High accuracy digitizer system
CALCOMP INC45 citations86
US5440327AAug 8, 1995
Polychromatic pen for pen plotters with color mixing at media surface
CALCOMP INC38 citations86
US5335000AAug 2, 1994
Ink vapor aerosol pen for pen plotters
CALCOMP INC48 citations86
US5710579AJan 20, 1998
Sensor system for printers
CALCOMP INC29 citations85
US4835347AMay 30, 1989
Shifting wire sequence digitizer system
CALCOMP INC23 citations81
US5701141ADec 23, 1997
Digitizer tablet system with dual-mode cursor/mouse
CALCOMP INC22 citations80
US5596351AJan 21, 1997
Ink level sensing on a pen carriage in a pen plotter
CALCOMP INC22 citations80
US5436646AJul 25, 1995
Cam operated cutter for roll-fed pen plotters
CALCOMP INC21 citations80
US4966560AOct 30, 1990
Coaxial connector plug using a center conductor sleeve and single point crimping
CALCOMP INC31 citations80
US5856639AJan 5, 1999
Pointer position detection system using a signal processor in the pointer
CALCOMP INC11 citations73
US5270692ADec 14, 1993
Digitizer cursor/mouse with unitary switch actuators
CALCOMP INC16 citations73
US5227909AJul 13, 1993
Single coil digitizer-coupled image scanner
CALCOMP INC15 citations73
US4831216AMay 16, 1989
Digitizer system with intertwined loopback conductor grid
CALCOMP INC11 citations73
US5821916AOct 13, 1998
Digitizer cursor velocity offset error correction system
CALCOMP INC13 citations72
US5326940AJul 5, 1994
Dynamically-adjustable scanning rate in digitizers
CALCOMP INC11 citations72
USD317783SJun 25, 1991
Thermal printer
CALCOMP INC12 citations72
US5325109AJun 28, 1994
Method and apparatus for manipulation of pixel data in computer graphics
CALCOMP INC14 citations71
USD339374SSep 14, 1993
Pedestal-mounted case for a pen plotter
CALCOMP INC12 citations71
US5134253AJul 28, 1992
Digitizer employing loopback conductor pattern using rotation sequencing
CALCOMP INC18 citations71
US5408591AApr 18, 1995
Automatic calibration and servo control scheme for offsetting mechanical and electronic component variances
CALCOMP INC19 citations70
US5408055AApr 18, 1995
Cordless transducer phase reference and data communication apparatus and method for digitizers
CALCOMP INC16 citations70
Showing the top 50 of 99 patents by PatentIndex Score.