Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5933506 | Transmitter-receiver having ear-piece type acoustic transducing part | Shigeaki Aoki, Kazumasa Mitsuhashi, Yutaka Nishino, Kohichi Matsumoto, Hiroyuki Matsui | 1999-08-03 |