Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5521338 | Method of installing sound absorbing bodies on a sound insulation wall and an installed sound absorbing body assembly | Masahito Watanabe, Kohei Yamamoto, Naoyuki Furuta | 1996-05-28 |
| 5329073 | Sound absorbing device for sound insulation wall | Masahito Watanabe, Kohei Yamamoto, Naoyuki Furuta | 1994-07-12 |