Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7380376 | Non-slip structure | Shunji Ohno, Norio Nakajima, Kazumichi Iwasa, Masanori Tsuji, Tsuyoshi Doi +3 more | 2008-06-03 |
| 7162839 | Non-slip material | Shunji Ohno, Kazumichi Iwasa, Norio Nakajima, Masanori Tsuji, Tsuyoshi Doi +3 more | 2007-01-16 |