Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D588325 | Link for power transmitting chain | Shigeo Kamamoto, Seiji Tada | 2009-03-10 |
| D581623 | Link for power transmitting chain | Shigeo Kamamoto, Seiji Tada | 2008-11-25 |
| D568573 | Linking pin for power transmitting chain | Shigeo Kamamoto, Seiji Tada | 2008-05-06 |