Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5316321 | Nonferrous piston ring with hard surface treatment layer | Yoshio Naruse | 1994-05-31 |
| 5310827 | Polyamide copolymers | Yukiatsu Komiya, Koji Hirai, Setuo Yamashita, Shinji Komori, Takuji Okaya | 1994-05-10 |
| 5308089 | Combined oil ring | — | 1994-05-03 |