Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4319831 | Cleaning device in a copying machine | Masao Matsui | 1982-03-16 |
| 4309479 | Conductive composite filaments | Tsutomu Naruse, Takao Osagawa, Masao Matsui, Kazuo Okamoto | 1982-01-05 |