Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9410625 | Combined oil control ring | Tadahiko Watanabe, Satoshi Koizumi | 2016-08-09 |
| 7243596 | Spacer expander | Miyuki Usui, Nobuo Katayama | 2007-07-17 |
| 5238721 | Title structure and method for applying title | — | 1993-08-24 |
| 4884837 | Handle fitting structure for packaging box | — | 1989-12-05 |