Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7536212 | Communication system using short range radio communication headset | Shinichi Tanaka, Kohei Momosaki, Yoichi Takebayashi | 2009-05-19 |
| 7110800 | Communication system using short range radio communication headset | Shinichi Tanaka, Kohei Momosaki, Yoichi Takebayashi | 2006-09-19 |
| 5460570 | Ventilator for elevator cage | Akihiko Okamura, Hideya Kohara | 1995-10-24 |
| 5029218 | Noise cancellor | — | 1991-07-02 |