Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7380376 | Non-slip structure | Norio Nakajima, Kazumichi Iwasa, Masanori Tsuji, Tsuyoshi Doi, Yoshihisa Kohzu +3 more | 2008-06-03 |
| 7162839 | Non-slip material | Kazumichi Iwasa, Norio Nakajima, Masanori Tsuji, Tsuyoshi Doi, Yoshihisa Kouzu +3 more | 2007-01-16 |
| 7021109 | Method and apparatus for manufacturing slip stopper | Kazumichi Iwasa, Norio Nakajima, Masanori Tsuji, Tsuyoshi Doi, Yoshihisa Kouzu +2 more | 2006-04-04 |