Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7574180 | Transmitter | Kensaku Abe, Nobuo Kobayashi, Hiroyoshi Sawama | 2009-08-11 |
| 6587571 | Speaker | Masao Fujihira, Ikuo Shinohara | 2003-07-01 |
| 6542617 | Speaker | Masao Fujihira, Ikuo Shinohara | 2003-04-01 |
| 6175637 | Acoustic transducer | Masao Fujihira, Makoto Yamagishi, Jun Kishigami, Takahiro Muraguchi, Ikuo Shinohara | 2001-01-16 |