CalComp Inc.
🏢 View company profile →100Patents
0Active
100Granted
42Portfolio score
Filing activity: Mar 16, 1987 → Sep 5, 1996
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5381160A | See-through digitizer with clear conductive grid | Physics | 251 | Expired |
| US4859813A | Digitizer tablet having electrical interconnect components on the writing substrate | Electricity | 155 | Expired |
| US4827086A | Digitizer cursor coil for reducing edge effect | Physics | 150 | Expired |
| US5247138A | Cordless digitizer stylus status encoding and transmission scheme | Physics | 76 | Expired |
| US5525981A | Cordless digitizer transducer/cursor status transmission apparatus and method | Physics | 71 | Expired |
| US5373118A | Half normal frequency regime phase encoding in cordless digitizers | Physics | 44 | Expired |
| US4806707A | 3-Dimensional digitizer pen | Physics | 38 | Expired |
| US4734546A | Digitizer system with loopback conductor grid | Physics | 37 | Expired |
| US4853499A | Ground switching technique for silkscreened digitizer grids | Physics | 34 | Expired |
| US5357062A | Pressure sensing apparatus for digitizer pen tip | Physics | 33 | Expired |
| US5854449A | High accuracy digitizer system | Physics | 31 | Expired |
| US4794208A | Frequency shifting digitizer for reducing AC fields interference | Physics | 30 | Expired |
| US5198623A | Method for use in a digitizer for determining pen tilt | Physics | 29 | Expired |
| US5124509A | Digitizer with capacitive and inductive coupling | Physics | 28 | Expired |
| US5335000A | Ink vapor aerosol pen for pen plotters | Performing Operations; Transporting | 28 | Expired |
| US5274198A | Printed conductive ink electrostatic shield for electromagnetic digitizers | Physics | 28 | Expired |
| US5357061A | Digitizer tablet having high permeability grid shield | Physics | 27 | Expired |
| US5440327A | Polychromatic pen for pen plotters with color mixing at media surface | Performing Operations; Transporting | 25 | Expired |
| US5045645A | Digitizer system with passive pointer | Physics | 24 | Expired |
| US5710579A | Sensor system for printers | Performing Operations; Transporting | 23 | Expired |
| US5204823A | Method and apparatus for high-speed layer thickness curing in 3-D model making | Performing Operations; Transporting | 21 | Expired |
| US4966560A | Coaxial connector plug using a center conductor sleeve and single point crimping | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4939318A | Digitizer pen tilt correction employing wires near the data point | Physics | 18 | Expired |
| US4907014A | Safely retracting paper-cutting apparatus for a roll paper printer | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4853497A | Shielding techique for digitizers | Physics | 17 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.