Ken Ohshima
18Patents
10h-index
24Co-inventors
72Inventor score
Filing activity: Oct 21, 1980 → Apr 8, 2005
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7551722B2 | X-ray target and apparatuses using the same | Electricity | 46 | Expired |
| US4611317A | Optical disk apparatus | Physics | 37 | Expired |
| US4505585A | System for detecting defects on an optical surface | Physics | 33 | Expired |
| US4710908A | Servo apparatus for compensating for warp and deflection deviations on optical discs | Physics | 32 | Expired |
| US4508450A | System for checking defects on a flat surface of an object | Physics | 32 | Expired |
| US4683560A | Microprocessor controlled focussing servo acquisition | Physics | 19 | Expired |
| US4785439A | Optical memory accessing and tracking apparatus with pickup and lens servoing during tracking | Physics | 13 | Expired |
| US4372504A | Magnetic record tape protective device for a tape cassette | Physics | 13 | Expired |
| US4718051A | Optical beam tracking system for use in optical information recording and/or reproducing apparatus | Physics | 10 | Expired |
| US4674071A | Data recording area signal generating method and apparatus | Physics | 10 | Expired |
| US4611316A | Actuator operating center detecting circuit and optical disk apparatus with the detecting circuit | Physics | 9 | Expired |
| US4644514A | Head drive control apparatus | Physics | 8 | Expired |
| US4495407A | System for focusing an optical head onto a flat surface | Physics | 5 | Expired |
| US5355355A | Electronic file apparatus capable of storing code data and image data into optical memory | Electricity | 4 | Expired |
| US4499514A | Disc drive apparatus | Physics | 4 | Expired |
| US4352473A | Tape cassette | Physics | 4 | Expired |
| US4355750A | Double-capstan tape driving device | Physics | 2 | Expired |
| US6116887A | Foam molding equipment | Performing Operations; Transporting | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.