Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7967900 | Air filtering apparatus | Hiroaki Usui, Nobuhiro Ogura, Toru Arakawa | 2011-06-28 |
| 7896947 | Air filtering apparatus | Kazuo Takahashi, Hiroaki Usui, Toshio Fukushima, Toru Arakawa, Hiroyuki Kobayashi +2 more | 2011-03-01 |