Issued Patents 2021
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11021871 | Porous sound-absorbing board | Ichiro Yamagiwa | 2021-06-01 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11021871 | Porous sound-absorbing board | Ichiro Yamagiwa | 2021-06-01 |