Hirobumi Ouchi
13Patents
7h-index
36Co-inventors
66Inventor score
Filing activity: Jan 26, 1979 → May 26, 2005
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5245491A | Magneto-optical head employing optical fiber connected stationary and movable portions | Physics | 32 | Expired |
| US5095472A | Focusing error detecting system for optical head | Physics | 29 | Expired |
| US4242695A | Low dark current photo-semiconductor device | Electricity | 21 | Expired |
| US4367483A | Optical semiconductor device | Electricity | 13 | Expired |
| US4740819A | Photo semiconductor device | Electricity | 11 | Expired |
| US4346395A | Light detecting photodiode-MIS transistor device | Electricity | 10 | Expired |
| US4816890A | Optoelectronic device | Electricity | 7 | Expired |
| US5634183A | Image printer | Physics | 6 | Expired |
| US4563764A | Semiconductor laser device | Electricity | 3 | Expired |
| US7144667B2 | Electrostatic charge image developing toner, and developer, image forming apparatus and image forming method using the same toner | Physics | 1 | Expired |
| US7570904B2 | Image forming apparatus | Physics | 1 | Active |
| US7813674B2 | Developing toner for electrophotography and electro-photographic device | Physics | 0 | Active |
| US7435519B2 | Electrophotographic toner and image forming apparatus | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.