Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5177549 | Image forming apparatus supplied with controllable bias voltage | Yasumasa Ohtsuka, Koichi Tanigawa, Akihiko Takeuchi, Hideo Nanataki, Hideyuki Yano +6 more | 1993-01-05 |
| 5157442 | Image forming apparatus | Koichi Tanigawa, Akihiko Takeuchi, Yasumasa Otsuka, Toshiyuki Yoshihara, Takayasu Yuminamochi +1 more | 1992-10-20 |
| 5153654 | Image forming apparatus having transfer member for carrying transfer material | Takayasu Yuminamochi, Koichi Tanigawa, Akihiko Takeuchi, Hiroshi Sasame, Yasumasa Ohtsuka +2 more | 1992-10-06 |
| 4965747 | Image forming apparatus | Yasumasa Ohtsuka, Koichi Tanigawa | 1990-10-23 |