Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7613307 | Active sound reduction apparatus and active noise insulation wall having same | Keizo Ohnishi, Masaharu Nishimura, Takanori Arai | 2009-11-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7613307 | Active sound reduction apparatus and active noise insulation wall having same | Keizo Ohnishi, Masaharu Nishimura, Takanori Arai | 2009-11-03 |