Mitsuhiro Koyama
5Patents
3h-index
3Co-inventors
50Inventor score
Filing activity: Nov 1, 1985 → Oct 30, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5894505A | Telephone answering machine | Electricity | 37 | Expired |
| US4639838A | Shadowless lighting equipment for medical use | Emerging Cross-Sectional Technologies | 25 | Expired |
| US5068767A | Automatic focus position adjusting unit for use in shadowless lighting device | Emerging Cross-Sectional Technologies | 15 | Expired |
| USD850681S1 | Light for medical use | General | 2 | Active |
| US10401004B2 | Head-mounted type lighting device | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.