Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7833323 | Flotage trapping device using electrostatic field | Makoto Takayanagi, Akitoshi Takagi | 2010-11-16 |
| 4901345 | Telephone set usable as an acoustic coupler | — | 1990-02-13 |