Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5195932 | Compact coil spring tensioner | Hideo Hirai, Yasuhiro Hashimoto, Naoki Fujimoto, Norikazu Tanaka, Susumu Yamakawa | 1993-03-23 |
| 4983145 | Apparatus for automatically tensioning a drive belt | Hideo Hirai, Yasuhiro Hashimoto, Naoki Fujimoto, Norikazu Tanaka, Susumu Yamakawa | 1991-01-08 |
| 4920788 | Rotation variation testing machine | Minori Kawaguchi, Susumu Yamakawa | 1990-05-01 |