Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6628931 | Shortwave receiver and antenna adaptor | — | 2003-09-30 |
| 5758276 | Double super-heterodyne receiver with low-pass and high-pass filters controlled by respective switching devices | Hiroshi Shirakawa | 1998-05-26 |
| 5424722 | Device for displaying remaining electric energy of battery | Mitsuharu Inada, Norio Ohga | 1995-06-13 |