Koichi Oyamada
6Patents
5h-index
7Co-inventors
45Inventor score
Filing activity: Sep 29, 1987 → Feb 13, 1991
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4880719A | Two component electrophotographic developer | Physics | 59 | Expired |
| US4933251A | Electrophotographic developer | Physics | 22 | Expired |
| US4837100A | Electrophotographic developer containing positively chargeable toner | Physics | 10 | Expired |
| US5032483A | Electrophotographic red toner | Physics | 8 | Expired |
| US4965162A | Electrophotographic developer containing tin oxide | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5252421A | Electrophotographic toner | Physics | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.