Yoshikazu Hirai
8Patents
5h-index
27Co-inventors
59Inventor score
Filing activity: Aug 30, 1991 → Apr 8, 2008
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6166778A | Broadcast receiving apparatus | Electricity | 153 | Expired |
| US5759332A | Process of reproducing optical discs and optical discs produced by the same | Performing Operations; Transporting | 27 | Expired |
| US5262667A | Semiconductor device for optical pick-up | Electricity | 11 | Expired |
| US6754437B1 | Receiver, recorder and player | Electricity | 7 | Expired |
| US7421105B2 | Method for staining corneocytes, method for preparing corneocytes specimen and skin analysis system | Physics | 6 | Active |
| US5215928A | Method of manufacturing a semiconductor device for optical pick-up | Electricity | 3 | Expired |
| US7425427B2 | Method for staining corneocytes, method for preparing corneocytes specimen and skin analysis system | Physics | 2 | Expired |
| US8488187B2 | Image forming apparatus and method for forming image | Performing Operations; Transporting | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.