Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6352961 | Grease composition for rolling bearing | Kenichi Iso, Hideki Koizumi, Michiharu Naka | 2002-03-05 |
| 5575570 | Cage for rolling bearing | Takahiko Uchiyama, Youichiro Sugimori, Toshimi Takajo, Michiharu Naka, Masao Yamamoto +1 more | 1996-11-19 |