Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4640808 | Method for making magnetic rolls | Kunio Okumura, Atsuo Tanaka | 1987-02-03 |
| 4517719 | Magnetic rolls for electrostatic recording devices | Kunio Okumura, Atsuo Tanaka | 1985-05-21 |