Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5251560 | Water-float coupling device | Akihiko Tanaka, Magohei Tsukamoto, Toshi Goto | 1993-10-12 |
| D269169 | Motorcycle | Tsunemi Kawashima, Kazunori Yamada, Toshiharu Shimizu | 1983-05-31 |
| D268998 | Motorcycle | Tsunemi Kawashima, Kazunori Yamada, Toshiharu Shimizu | 1983-05-17 |
| D267561 | Motorcycle | Tsunemi Kawashima, Toshiharu Shimizu | 1983-01-11 |