Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870444 | Copying apparatus | Takemi Yamamoto, Naoyuki Hatta, Yumio Matsumoto, Fumihiro Sunda | 1989-09-26 |
| 4851881 | Optical printing system | Takemi Yamamoto, Koji Kobayakawa, Ichiro Sasaki, Akira Sago, Izumi Takagi +2 more | 1989-07-25 |