Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6355135 | Method of laminating gas permeable sheet material | Osamu Inoue, Jun Asano, Katsutoshi Yamamoto, Osamu Tanaka, Shinichi Chaen +1 more | 2002-03-12 |
| 6336948 | Fire-retardant filter medium and air filter unit | Osamu Inoue, Shinichi Chaen, Nobuki Uraoka, Jun Asano, Seiichi Hirano +1 more | 2002-01-08 |
| 6269681 | Group of particles for air filter test and method of air filter test | Satoshi Hara | 2001-08-07 |
| 6261979 | Filter medium and air filter unit using the same | Osamu Tanaka, Yoshiyuki Shibuya, Takeshi Tano | 2001-07-17 |
| 6235388 | Fibrous materials of fluororesins and deodorant and antibacterial fabrics made by using the same | Katsutoshi Yamamoto, Jun Asano | 2001-05-22 |
| 6027553 | Air filter unit and method for manufacturing the same | Seiichi Hirano, Tomizou Soda | 2000-02-22 |
| 5834528 | Polytetrafluoroethylene porous composite film | Osamu Tanaka, Katsutoshi Yamamoto, Osamu Inoue, Shinichi Chaen, Jun Asano +1 more | 1998-11-10 |
| 5772884 | Porous polytetrafluoroethylene film and process for preparation thereof | Osamu Tanaka, Jun Asano, Katsutoshi Yamamoto, Osamu Inoue, Shinichi Chaen +2 more | 1998-06-30 |
| 5562986 | Polytetrafluoroethylene fibers, polytetrafluoroethylene materials and process for preparation of the same | Katsutoshi Yamamoto, Osamu Tanaka, Osamu Inoue, Shinichi Chaen, Jun Asano +1 more | 1996-10-08 |
| D366106 | Air filter | Katsutoshi Yamamoto, Osamu Tanaka, Osamu Inoue, Shinichi Chaen, Jun Asano +1 more | 1996-01-09 |
| 5409515 | Filter apparatus and filter element | Katsutoshi Yamamoto, Osamu Tanaka, Osamu Inoue, Shinichi Chaen, Jun Asano +1 more | 1995-04-25 |
| 5234739 | Polytetrafluoroethylene porous film and preparation and use thereof | Shinji Tanaru, Osamu Tanaka, Hirofumi Nishibayashi, Osamu Inoue, Katsutoshi Yamamoto | 1993-08-10 |