Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4455636 | Record cleaning device | Tatsuhiko Tsutsui, Tsuneo Unezawa | 1984-06-19 |
| 4378597 | Record cleaning device | Tatsuhiko Tsutsui, Tsuneo Umezawa | 1983-03-29 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4455636 | Record cleaning device | Tatsuhiko Tsutsui, Tsuneo Unezawa | 1984-06-19 |
| 4378597 | Record cleaning device | Tatsuhiko Tsutsui, Tsuneo Umezawa | 1983-03-29 |