Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 7052019 | Piston ring and method of manufacturing the same | — | 2006-05-30 | |
| 5779219 | Solenoid valve | Yoshihito Ohya, Motoaki Hayashi, Hisanori Okamoto, Masashige Uematsu | 1998-07-14 | $343,000 |
| 4542907 | Corrugated expander for piston ring assembly | Ko Chiba, Yoshiaki Wada, Sumio Ono | 1985-09-24 |