Oki Data Corporation
1,881Patents
1,443Active
1,881Granted
61Portfolio score
Filing activity: Dec 22, 1976 → Aug 20, 2020 · 541 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6019461A | Printer and printing cartridge therefor | Performing Operations; Transporting | 215 | Expired |
| US5937089A | Color conversion method and apparatus | Electricity | 171 | Expired |
| US6069642A | Cassette for holding ink ribbon and print paper therein and printer incorporating the cassette therein | Performing Operations; Transporting | 112 | Expired |
| US5832126A | Method and apparatus for compressing mixed text and image data | Electricity | 108 | Expired |
| US6600575B1 | Clock supply circuit | Electricity | 82 | Expired |
| US6061473A | Compression and expansion methods and apparatus | Physics | 80 | Expired |
| US8035115B2 | Semiconductor apparatus, print head, and image forming apparatus | Electricity | 75 | Active |
| US6549738B2 | Image forming cartridge and image forming apparatus having a photoreceptor drum that rotates at a constant velocity and is stably grounded | Physics | 72 | Expired |
| US6144459A | Facsimile machine adapted to reduce risk of data loss | Electricity | 66 | Expired |
| US7336262B2 | Coordinate-capturing apparatus | Physics | 62 | Expired |
| US6028472A | Temperature sensing circuit, driving apparatus, and printer | Electricity | 53 | Expired |
| US5781823A | Image forming apparatus having a plurality of image forming sections each having different means of forming images | Physics | 48 | Expired |
| US6217017A | Paper-feeding apparatus and method of feeding paper | Performing Operations; Transporting | 47 | Expired |
| US5798777A | Ink jet printer having a capping mechanism | Performing Operations; Transporting | 46 | Expired |
| US6266511A | Image recording apparatus | Emerging Cross-Sectional Technologies | 43 | Expired |
| US7218872B2 | Image forming apparatus | Physics | 41 | Expired |
| US6297842A | Organic electroluminescent light-emitting array and optical head assembly | Electricity | 40 | Expired |
| US6163036A | Light emitting element module with a parallelogram-shaped chip and a staggered chip array | Electricity | 39 | Expired |
| US6243416A | Image coding and decoding methods, image coder, and image decoder | Electricity | 39 | Expired |
| US6023594A | Image forming apparatus having a plurality of image forming stations including devices and receiving sections for detachably receiving the devices | Physics | 37 | Expired |
| US6408156B1 | Image recording apparatus in which a plurality of images of different colors are printed in registration | Physics | 37 | Expired |
| US6343883B1 | Toner cartridge comprising a magnet assembly | Physics | 37 | Expired |
| US5722019A | Toner cartridge and drum cartridge for receiving the toner cartridge therein | Emerging Cross-Sectional Technologies | 36 | Expired |
| US7187876B2 | Image forming apparatus with mechanism to control toner replenishment | Physics | 35 | Expired |
| US6913985B2 | Method of manufacturing a semiconductor device | Emerging Cross-Sectional Technologies | 32 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.