Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6109388 | Sound absorbing mechanism using a porous material | Kouji Tsukamoto, Katsuhisa Ootsuta, Shuichi Tani, Toshihisa Imai | 2000-08-29 |
| 5905234 | Sound absorbing mechanism using a porous material | Kouji Tsukamoto, Katsuhisa Ootsuta, Shuichi Tani, Toshihisa Imai | 1999-05-18 |