Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6301821 | Tubular substance and manufacturing method therefor | Kenichi Kameda, Hideyuki Naitou, Tomoyoshi Tsurufuji, Nobuaki Takamatsu | 2001-10-16 |
| 6233862 | Interline fishing rod | Tomoyoshi Tsurufuji, Shoichi Koganei, Eiji Sugaya, Hiroshi Hashimoto, Masaru Akiba +2 more | 2001-05-22 |
| 6108959 | Interline fishing rod | Tomoyoshi Tsurufuji, Shoichi Koganei, Eiji Sugaya, Hiroshi Hashimoto, Masaru Akiba +2 more | 2000-08-29 |
| 6088947 | Member for fishing or sport tool | Mamoru Koike, Eiji Sugaya, Mitsuo Imai | 2000-07-18 |
| 5686155 | Hollow cylindrical member | Yuichi Aizawa | 1997-11-11 |
| 5665441 | Hollow cylindricall member | Yuichi Aizawa | 1997-09-09 |
| 5245779 | Fishing rod and other tubular bodies | Masaru Akiba | 1993-09-21 |
| 5076004 | Fishing rod and production method thereof | Shunji Sunaga, Eiji Sugaya, Toshiaki Esashika | 1991-12-31 |