Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6582599 | Filter | Kouichi Ito, Takashi Arai | 2003-06-24 |
| 5993580 | Process for manufacturing a filter element | Toshiaki Nakayama, Yoshitaka Nishio, Tetsuro Okazono, Takanari Takagaki | 1999-11-30 |
| 5888442 | Method of manufacturing a filter element | Kazuo Kometani, Toshiaki Nakayama, Satoshi Inukai, Takanari Takagaki, Minoru Honda | 1999-03-30 |
| 5720790 | Filter element | Kazuo Kometani, Toshiaki Nakayama, Satoshi Inukai, Takanari Takagaki, Minoru Honda | 1998-02-24 |
| 5674302 | Automobile filter element | Toshiaki Nakayama, Yoshitaka Nishio, Tetsuro Okazono, Takanari Takagaki | 1997-10-07 |
| 4236901 | Air cleaner with secondary air filter element | Yasutosi Kato, Tadashi Ogawa, Kazuhiko Ito, Katsuziro Sato, Tatsuo ASAI | 1980-12-02 |