Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4931374 | Electrophotographic positive charging toner containing a copper phthalocyanine blue pigment | Masami Tomita, Toshiki Nanya, Hisao Murayama | 1990-06-05 |
| 4554233 | Electrophotographic toner containing triazolium compound as charge controlling agent | Mitsuru Hashimoto, Toshiki Nanya, Hisao Murayama | 1985-11-19 |
| 4401740 | Electrographic development process | Hachiro Tosaka, Toshiki Nanya | 1983-08-30 |