Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7052533 | Filter element, method for manufacture thereof, and filter using said element | Fumio Nakahara, Takayuki Yoshikawa | 2006-05-30 |
| 6554886 | Porous adsorbent and filter | Takayuki Yoshikawa, Shushi Nishimura | 2003-04-29 |
| 6207255 | Adsorbent article with dust collection function | Teruhiro Okada, Shohichi Takamoto, Shushi Nishimura | 2001-03-27 |