CSK Inc.
34Patents
2Active
34Granted
48Portfolio score
Filing activity: Jan 16, 1987 → Nov 28, 2021
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6634992B1 | Training machine, image output processing device and method, and recording medium which stores image outputting programs | Emerging Cross-Sectional Technologies | 92 | Expired |
| US6852068B2 | Training machine, image output processing device and method, and recording medium which stores image outputting programs | Emerging Cross-Sectional Technologies | 48 | Expired |
| US4994658A | Apparatus for controlling movement of an optical memory card for data transfer therewith | Physics | 22 | Expired |
| US5136503A | Machine translation system | Physics | 21 | Expired |
| US4933537A | Apparatus for controlling movement of an optical memory card for data transfer therewith | Physics | 21 | Expired |
| US5136588A | Interleaving method and apparatus | Electricity | 17 | Expired |
| US5027337A | Optical recording medium and tracking method therefor | Physics | 11 | Expired |
| US4831609A | Tracking method and apparatus for optical recording medium | Physics | 11 | Expired |
| US5067812A | Systems for inspecting defects in an optical recording medium | Physics | 9 | Expired |
| US6805656B2 | Training machine, image output processing device and method, and recording medium which stores image outputting programs | Emerging Cross-Sectional Technologies | 9 | Expired |
| US5050171A | Burst error correction apparatus | Physics | 9 | Expired |
| US4817067A | Optical recording medium | Physics | 8 | Expired |
| US5113378A | Optical tracking system for an optical recording arrangement with plurality of beams | Physics | 8 | Expired |
| US4982077A | Recording format for optical recording medium | Physics | 8 | Expired |
| US4881214A | Data record formatting system and reading/writing system for optical recording medium | Physics | 7 | Expired |
| US5164577A | Optical recording medium with region for identifying defective written data | Physics | 7 | Expired |
| US5128917A | Tracking device for optical memory card | Physics | 6 | Expired |
| US5181194A | Writing device for optical memory card | Physics | 6 | Expired |
| US5070491A | Error signal generating circuit | Physics | 5 | Expired |
| US5198646A | System for detecting punched holes of magnetic cards | Physics | 5 | Expired |
| US4794244A | Method and apparatus for detecting focussing position deviation of read/write apparatus in an optical recording medium | Physics | 4 | Expired |
| US4885736A | Optical recording medium with track and track number guides | Physics | 4 | Expired |
| US5053610A | Reading apparatus and photodetector for optical recording medium | Physics | 4 | Expired |
| US4815062A | Write-once data writing system for optical recording medium | Physics | 3 | Expired |
| US5212602A | Magnetic head having fuse within head case | Physics | 3 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.