Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5594803 | Silencing apparatus operable to reduce vehicle noise at a telephone | Susumu Fujiwara, Masahiko Sakata | 1997-01-14 |
| 5548652 | Silencing apparatus | Susumu Fujiwara, Masahiko Sakata | 1996-08-20 |