Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7510196 | Oil ring for internal combustion engine | Keishi Nanno, Kazuhito Seki | 2009-03-31 |
| 7354045 | Oil ring | Tomoaki Abe, Keishi Nanno, Hideshi Hitosugi | 2008-04-08 |
| 6039480 | Method and apparatus for forming transfer images and transfer drum used in the same | Tomio Andoh, Tomoyuki Marugame | 2000-03-21 |