Hirochika Nakajima
5Patents
5h-index
10Co-inventors
56Inventor score
Filing activity: Sep 26, 1984 → Mar 5, 1999
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6236786A | Substrate with optical waveguide and method of making the same | Electricity | 37 | Expired |
| US4806442A | Spatial phase modulating masks and production processes thereof, and processes for the formation of phase-shifted diffraction gratings | Emerging Cross-Sectional Technologies | 33 | Expired |
| US4637027A | Laser light source device | Electricity | 28 | Expired |
| US5080486A | Spectrum measuring equipment utilizing double-image polarizing element | Physics | 11 | Expired |
| US4730884A | Bipolar voltage controlled optical switch using intersecting waveguides | Physics | 10 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.