Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879197 | Method of developing electronic photograph with liquid developer and cleaning excess thereof | Isao Kohmura, Takao Senga, Hirokazu Yamamoto, Mamoru Nakatani, Jun Yamada | 1989-11-07 |
| 4837103 | Negative charging liquid developer for electrophotography | Hirokazu Yamamoto | 1989-06-06 |