Keisuke Sumida
8Patents
6h-index
21Co-inventors
55Inventor score
Filing activity: Feb 28, 1990 → Jun 1, 1995
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5550290A | Benzidine derivative and electrophotosensitive material using the same | Physics | 20 | Expired |
| US5059503A | Electrophotosensitive material with combination of charge transfer materials | Physics | 14 | Expired |
| US5153088A | Electrophotosensitive material with x-type metal free phthalocyanine and perylene compound | Physics | 7 | Expired |
| US5087544A | Perylene electrophotosensitive material with m-phenylenediamine | Physics | 7 | Expired |
| US5521044A | Electrophotosensitive material | Physics | 7 | Expired |
| US5851712A | Electrophotosensitive material | Physics | 7 | Expired |
| US5494765A | Electrophotosensitive material using a phenylenediamine derivative | Physics | 6 | Expired |
| US5514508A | Electrophotosensitive material | Physics | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.