Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5252421 | Electrophotographic toner | Masanori Ichimura, Toru Murakami | 1993-10-12 |
| 5032483 | Electrophotographic red toner | Masanori Ichimura, Toru Murakami | 1991-07-16 |
| 4965162 | Electrophotographic developer containing tin oxide | Shigeo Aonuma | 1990-10-23 |
| 4933251 | Electrophotographic developer | Masanori Ichimura, Toru Murakami | 1990-06-12 |
| 4880719 | Two component electrophotographic developer | Toshiaki Murofushi, Hiroshi Nakazawa, Shigeo Aonuma, Yoshimi Amagai, Yasuhiro Ohya | 1989-11-14 |
| 4837100 | Electrophotographic developer containing positively chargeable toner | Toshiaki Murofushi, Yasuhiro Ohya, Hiroshi Nakazawa | 1989-06-06 |