Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10229665 | Porous sound absorbing structure | Ichiro Yamagiwa, Zenzo Yamaguchi, Akio Sugimoto, Hideki Ishitobi | 2019-03-12 |
| 9564118 | Sound insulating structure | Ichiro Yamagiwa, Zenzo Yamaguchi, Akio Sugimoto | 2017-02-07 |
| 9453336 | Porous sound absorbing structure | Ichiro Yamagiwa, Zenzo Yamaguchi, Akio Sugimoto, Hideki Ishitobi | 2016-09-27 |