Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6463223 | Electrophotographic image forming apparatus, process cartridge developing device, developer supply container and measuring part therefor | Toshiyuki Karakama, Hideki Matsumoto, Akiyoshi Yokoi | 2002-10-08 |
| 6253036 | Electrophotographic image forming apparatus, process cartridge, developing device and measuring part | Toshiyuki Karakama, Hideki Matsumoto, Akiyoshi Yokoi | 2001-06-26 |
| 5561285 | Image forming apparatus and light quantity control device having a light emission mode control means | Koichi Otaka, Masako Takahashi | 1996-10-01 |