Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5689804 | Medium-frequency radio transmission system | Tatehiko Toyosawa, Kazumi Shoji, Shinichi Watanabe, Atsumi Fujiwara, Masaaki Kitanda | 1997-11-18 |
| 5537637 | Medium-frequency radio broadcasting retransmission system for confined and electromagnetically shielded areas | Tatehiko Toyosawa, Kazumi Shoji, Shinichi Watanabe, Atsumi Fujiwara, Masaaki Kitanda | 1996-07-16 |