Howtek, Inc.
21Patents
0Active
21Granted
33Portfolio score
Filing activity: Nov 8, 1984 → Oct 15, 1997
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6606171B1 | Digitizing scanner | Electricity | 233 | Expired |
| US4741930A | Ink jet color printing method | Emerging Cross-Sectional Technologies | 49 | Expired |
| US4870430A | Solid ink delivery system | Performing Operations; Transporting | 46 | Expired |
| US4721635A | Color printed record and method | Emerging Cross-Sectional Technologies | 45 | Expired |
| US4714936A | Ink jet printer | Performing Operations; Transporting | 40 | Expired |
| US4820346A | Ink jet printer ink | Chemistry; Metallurgy | 39 | Expired |
| US4666757A | Color printed record | Emerging Cross-Sectional Technologies | 32 | Expired |
| US5237172A | Calibrated color scanner with reference level adjustment | Electricity | 19 | Expired |
| US4870431A | Ink jet priming system | Performing Operations; Transporting | 17 | Expired |
| US4928112A | Ink curing apparatus | Physics | 16 | Expired |
| US6105954A | Sheet feeder for digitizing scanner | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4931095A | Benzoate inks | Chemistry; Metallurgy | 13 | Expired |
| US4591281A | Sheet-feed mechanism for rotary print head | Performing Operations; Transporting | 13 | Expired |
| US5424537A | Calibrated color scanner | Electricity | 9 | Expired |
| US5084712A | Head tending method and apparatus for an ink jet printer | Performing Operations; Transporting | 8 | Expired |
| US4968994A | Head tending apparatus for an ink jet printer | Performing Operations; Transporting | 7 | Expired |
| US5196236A | Ink jet color printing method | Chemistry; Metallurgy | 7 | Expired |
| US6023348A | Rotary image scanner capable of mounting drums of various diameters | Electricity | 6 | Expired |
| US5367769A | Method of manufacturing a rotary scanning drum | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4974070A | Colorgraphic reproduction system | Electricity | 4 | Expired |
| US5515182A | Rotary scanner | Electricity | 3 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.