Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4741066 | Brush | Ryu Ito, Akiyoshi Umebara | 1988-05-03 |
| 4378597 | Record cleaning device | Tatsuhiko Tsutsui, Toru Sema | 1983-03-29 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4741066 | Brush | Ryu Ito, Akiyoshi Umebara | 1988-05-03 |
| 4378597 | Record cleaning device | Tatsuhiko Tsutsui, Toru Sema | 1983-03-29 |