Kenzo Nakagawa
8Patents
4h-index
8Co-inventors
50Inventor score
Filing activity: Jan 9, 1978 → Aug 21, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4688206A | Device for opening and closing a shutter member of a disk cartridge | Physics | 42 | Expired |
| US5043974A | Disc cartridge | Physics | 28 | Expired |
| US4220879A | Brushless DC motor | Electricity | 24 | Expired |
| US6246829A | Recording medium driver | Electricity | 11 | Expired |
| US9423589B2 | Lens holder, lens driving device, camera device and electronic device | Electricity | 1 | Active |
| US6741802B1 | Elastic support assembly for disk device for disk recording apparatus with video camera | Physics | 1 | Expired |
| US7648671B2 | Method of making master for manufacturing optical disc and method of manufacturing optical disc | Physics | 1 | Expired |
| US8119043B2 | Method of making master for manufacturing optical disc and method of manufacturing optical disc | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.