Kazuyuki Hirooka
9Patents
5h-index
18Co-inventors
56Inventor score
Filing activity: Mar 15, 1991 → Nov 29, 2007
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6421196B1 | Method and apparatus for controlling recording medium | Physics | 24 | Expired |
| US6643086B1 | Tape driving apparatus | Physics | 12 | Expired |
| US7684097B2 | Recording apparatus and phase modulation device | Physics | 11 | Active |
| US6680817B1 | Recording medium device containing recording medium and recording/reproducing device | Physics | 6 | Expired |
| US6667846B2 | Information storage device having tape cassette with noncontact memory and antenna | Physics | 6 | Expired |
| US5093727A | Image sensor having photodiodes of improved response to low intensity optical input | Electricity | 5 | Expired |
| US7502297B2 | Hologram recording apparatus, hologram reproducing apparatus, hologram recording method, and hologram reproducing method | Physics | 3 | Active |
| US7764584B2 | Reproducing apparatus, reproducing method, recording and reproducing apparatus, recording and reproducing method, recording apparatus, and recording method | Physics | 1 | Active |
| US7835049B2 | Reproducing apparatus and reproducing method | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.