Michio Hirohata
49Patents
12h-index
33Co-inventors
81Inventor score
Filing activity: Nov 17, 1976 → Dec 30, 1996
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4451129A | Camera having a plurality of built-in lenses | Physics | 70 | Expired |
| US4390262A | Electromagnetically operated diaphragm shutter | Physics | 43 | Expired |
| US4348092A | Electromagnetically driven shutter | Physics | 17 | Expired |
| US4601563A | Motor driven focal length changing device for a camera | Physics | 17 | Expired |
| US5005038A | Focal length changeable camera | Physics | 16 | Expired |
| US4725864A | Vari-focal camera | Physics | 13 | Expired |
| US4153355A | Camera incorporated with a movable flash light device | Physics | 13 | Expired |
| US4322145A | Shutter device for camera | Physics | 13 | Expired |
| US5285232A | Red-eye phenomenon preventing device | Physics | 13 | Expired |
| US4466723A | Electromagnetic drive device | Physics | 13 | Expired |
| USD293917S | Camera | General | 13 | Expired |
| US4458996A | Photographic operation control circuit for camera | Physics | 12 | Expired |
| US4396267A | Electromagnetic driving device for a camera | Physics | 10 | Expired |
| US4811060A | Optical system shifting device for a camera | Physics | 10 | Expired |
| US4348094A | Rotor of electromagnetically driven device for exposure control | Physics | 10 | Expired |
| USD308214S | Camera | General | 8 | Expired |
| USD306452S | Camera | General | 8 | Expired |
| US4349264A | Electromagnetically driven shutter | Physics | 8 | Expired |
| US4724450A | Motorized camera | Physics | 7 | Expired |
| US4357087A | Camera incorporated with a movable flash light device | Physics | 7 | Expired |
| US4466725A | Electromagnetic drive device for camera | Physics | 6 | Expired |
| US4420237A | Exposure control system | Physics | 6 | Expired |
| US4983998A | Flash device for camera | Physics | 6 | Expired |
| US4508442A | Electromagnetically driven shutter camera having automatic focusing device | Physics | 6 | Expired |
| US4505567A | Electromagnetically driven shutter with focus adjusting function | Physics | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.