Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4678161 | Ball valve | Teruyoshi Asano, Shigenobu Kato, Katsuhiko Tanioka | 1987-07-07 |
| 4667926 | Ball valve | Shinji Takeda, Teruyoshi Asano | 1987-05-26 |
| 4296954 | Pipe coupling and pipe joint connection | Kiyoshi Fujimaki, Takesi Okuyama, Tutomu Hashimoto | 1981-10-27 |