Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4722535 | Oil ring structure having reduced rigidity | Yorishige Maeda, Yoshiaki Wada, Sumio Ono | 1988-02-02 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4722535 | Oil ring structure having reduced rigidity | Yorishige Maeda, Yoshiaki Wada, Sumio Ono | 1988-02-02 |