Shigeo Hirano
99Patents
15h-index
117Co-inventors
87Inventor score
Filing activity: Oct 28, 1977 → Apr 26, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5971566A | Plasma display device and its manufacturing method | Electricity | 67 | Expired |
| US4968596A | Method for forming a direct positive image | Emerging Cross-Sectional Technologies | 49 | Expired |
| US4323643A | Silver halide photographic light-sensitive materials | Emerging Cross-Sectional Technologies | 36 | Expired |
| US4770990A | Silver halide photographic light-sensitive material containing a compound capable of imagewise releasing a photographically useful group during development | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4332878A | Photographic image-forming method | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4489155A | Silver halide color photographic materials with diffusible dye for improving graininess | Physics | 22 | Expired |
| US4447522A | Method of forming a photographic image | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4740453A | Silver halide photosensitive material containing a compound capable of releasing a photographically useful group | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4243739A | Silver halide photographic light-sensitive material | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4390618A | Silver halide photographic light-sensitive materials | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4195999A | Silver halide photographic material containing ultraviolet light absorbing agent | Physics | 19 | Expired |
| US4458010A | Process for bleaching color photographic sensitive materials | Physics | 17 | Expired |
| US4448878A | Silver halide photographic light-sensitive materials | Physics | 17 | Expired |
| US4476219A | Silver halide color photographic material | Physics | 16 | Expired |
| US4245037A | Direct positive silver halide light-sensitive material | Physics | 16 | Expired |
| US4272614A | Silver halide photographic light-sensitive material | Emerging Cross-Sectional Technologies | 15 | Expired |
| US5110719A | Process for preparing a direct positive photographic material | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4429036A | Method of forming a photographic image | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5061614A | Silver halide emulsion, method of manufacturing the same, and color photographic light-sensitive material using the emulsion | Physics | 14 | Expired |
| US4607006A | Silver halide photographic light-sensitive material containing non-spectral sensitizing electron donative silver halide adsorptive compound | Physics | 14 | Expired |
| US4914002A | Silver halide photographic material | Physics | 14 | Expired |
| US4255511A | Direct positive silver halide light-sensitive material | Physics | 13 | Expired |
| US4481285A | Method of treating direct positive silver halide sensitive material | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4770982A | Silver halide photographic materials containing a compound which releases a photographically useful group | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4719174A | Direct positive silver halide photographic light-sensitive material depress formation of re-reversed negative image | Physics | 13 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.