Hirofumi Kan
78Patents
9h-index
129Co-inventors
81Inventor score
Filing activity: Oct 17, 1974 → Dec 27, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5872804A | Solid-state laser amplifier | Electricity | 23 | Expired |
| US9953729B2 | Radiation generating apparatus and radiation generating method | Emerging Cross-Sectional Technologies | 18 | Active |
| US5982094A | Electron tube with polycrystalline diamond photocathode | Electricity | 13 | Expired |
| US6917058B2 | Semiconductor photocathode | Electricity | 13 | Expired |
| US3961996A | Process of producing semiconductor laser device | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5986387A | Transmission type electron multiplier and electron tube provided | Electricity | 12 | Expired |
| US4183038A | Semiconductor laser device | Electricity | 12 | Expired |
| US5959400A | Electron tube having a diamond field emitter | Electricity | 11 | Expired |
| US7522643B2 | Semiconductor laser device | Electricity | 10 | Expired |
| US7664148B2 | Passive Q switch laser device | Electricity | 9 | Expired |
| US7424044B2 | Semiconductor laser device | Electricity | 9 | Expired |
| US8075726B2 | Method for producing hermetically sealed container for beverage or food | Performing Operations; Transporting | 8 | Active |
| US7759139B2 | Method for manufacturing silicon device | Electricity | 6 | Active |
| US4875093A | Ultrafast continuous imaging apparatus | Emerging Cross-Sectional Technologies | 6 | Expired |
| US7372877B2 | Fiber laser unit | Electricity | 6 | Expired |
| US6895026B2 | Heat sink and semiconductor laser apparatus and semiconductor laser stack apparatus using the same | Electricity | 6 | Expired |
| US6804275B2 | Heat sink and semiconductor laser apparatus and semiconductor laser stack apparatus using the same | Electricity | 4 | Expired |
| US7599414B2 | Laser device | Electricity | 4 | Expired |
| US10727524B2 | Cell stack device | Emerging Cross-Sectional Technologies | 3 | Active |
| US7486710B2 | Semiconductor laser device and method of manufacturing the same | Electricity | 3 | Expired |
| US6931047B2 | Laser light source | Electricity | 3 | Expired |
| US10862138B2 | Electrochemical cell and cell stack device | Emerging Cross-Sectional Technologies | 3 | Active |
| US6831341B2 | Photocathode having AlGaN layer with specified Mg content concentration | Electricity | 3 | Expired |
| US7447248B2 | Semiconductor laser element and semiconductor laser element array | Electricity | 3 | Expired |
| US7764432B2 | Laser equipment | Electricity | 3 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.