Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5640263 | Optical scanner for an image forming apparatus | — | 1997-06-17 |
| 5122837 | Toner cartridge for an image forming apparatus | Yasuji Takagi, Kouji Ishigaki | 1992-06-16 |
| 4963938 | Toner cartridge for an image forming apparatus | Yasuji Takagi, Kouji Ishigaki | 1990-10-16 |