Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5689804 | Medium-frequency radio transmission system | Tadao Sugita, Tatehiko Toyosawa, Shinichi Watanabe, Atsumi Fujiwara, Masaaki Kitanda | 1997-11-18 |
| 5537637 | Medium-frequency radio broadcasting retransmission system for confined and electromagnetically shielded areas | Tadao Sugita, Tatehiko Toyosawa, Shinichi Watanabe, Atsumi Fujiwara, Masaaki Kitanda | 1996-07-16 |
| 5243656 | Audio circuit | Kikuo Tanida, Isao Kunimoto | 1993-09-07 |