Masazumi Ishikawa
39Patents
10h-index
42Co-inventors
75Inventor score
Filing activity: Apr 3, 1985 → Jun 12, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4741603A | Electrochromic nonglaring mirror | Physics | 282 | Expired |
| US4832467A | Electrochromic variable color tone nonglaring mirror | Physics | 41 | Expired |
| US5703701A | Film information communication apparatus, film information printing apparatus, information processing apparatus and index printer | Physics | 38 | Expired |
| US5447827A | Photographic processing method | Physics | 20 | Expired |
| US6832831B2 | Image forming apparatus | Performing Operations; Transporting | 20 | Expired |
| US5436694A | Film sheet | Physics | 19 | Expired |
| US5452050A | Image printer | Physics | 17 | Expired |
| US5790240A | Image exposure system | Physics | 16 | Expired |
| US5684568A | Image printer | Physics | 13 | Expired |
| US6118556A | Film information communication apparatus, film information printing apparatus, information processing apparatus and index printer | Electricity | 12 | Expired |
| US4983957A | Electrochromic display device capable of display in plural colors | Physics | 10 | Expired |
| US4565860A | Polymer of triphenylamine | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5620071A | Electrically controlled force transmitting method and electrically controlled force transmitting apparatus | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US5661544A | Exposure correcting method for a photographic printer and photographic printing apparatus | Physics | 8 | Expired |
| US7086727B2 | Heat fixing apparatus for sublimating and fixing sublimating ink to recording medium | Performing Operations; Transporting | 7 | Expired |
| US5617171A | Photographic processing method | Physics | 7 | Expired |
| US5734461A | Photographic image exposing apparatus | Physics | 6 | Expired |
| US5099356A | Electrochromic device with an electrolyte comprising a lithium salt and a sodium salt | Physics | 5 | Expired |
| US10544615B2 | Actuator for opening and closing a vehicle door | Mechanical Engineering; Lighting; Heating | 5 | Active |
| US4786715A | Electrochromic polymer comprising N,N'-diphenyl-N,N'-diphenylene-phenylene diamine units | Electricity | 5 | Expired |
| US5434643A | Image printer having projection exposure means | Physics | 5 | Expired |
| US6824264B2 | Image forming apparatus | Performing Operations; Transporting | 4 | Expired |
| US10900270B2 | Actuator for a vehicle-door | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US6893122B2 | Image forming apparatus | Performing Operations; Transporting | 4 | Expired |
| US5790238A | Photographic image exposing apparatus | Physics | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.