Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D514533 | Noise absorber | Hiroyuki Sugiyama | 2006-02-07 |
| 5703557 | Noise absorbing device | Fumishiro Tsuda, Norio Saito, Takeji Ihara, Yoshio Wagatsuma, Hitoshi Moriya | 1997-12-30 |