Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6619666 | Metal gasket assembly | Akira Tanaka | 2003-09-16 |
| 5749996 | Method of producing reclaimed joint sheet and the reclaimed jointsheet | Tsutomu Tomizawa, Yoshihiko Tatemichi, Ken Fujiwara, Hiroyuki Nakano | 1998-05-12 |
| 5690342 | Metal gasket assembly with full beads, half beads, and shims | Akira Tanaka | 1997-11-25 |
| 5664790 | Metal gasket assembly with shims | Akira Tanaka | 1997-09-09 |
| 5658657 | Reclaimed joint sheet | Tsutomu Tomizawa, Yoshihiko Tatemichi, Ken Fujiwara, Hiroyuki Nakano | 1997-08-19 |
| 5639101 | Metal gasket assembly with shims | Akira Tanaka | 1997-06-17 |
| 5628518 | Metal gasket assembly | Hideaki Ushio, Kazuo Shibata, Naomichi Mitsuyama, Akira Tanaka | 1997-05-13 |
| 5628113 | Metal gasket assembly | Akira Tanaka | 1997-05-13 |
| 5601292 | Metal gasket assembly with shims | Akira Tanaka | 1997-02-11 |
| 5568932 | Metal gasket assembly with shims | Akira Tanaka | 1996-10-29 |