Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8636838 | Oxygen concentrator | Hirofumi Watanabe | 2014-01-28 |
| 6681018 | Audio signal processor and audio device | Shigeharu Watanabe | 2004-01-20 |
| 6490009 | Electronic device for selecting inputs and outputs of audio-visual equipment | — | 2002-12-03 |
| 6313812 | Single remote control system for plurality of audio and visual equipment | Shuichi Nagano, Akira Katsuyama, Hiroshi Koyama, Takashi Ishizuka, Takahiro Hirai +3 more | 2001-11-06 |
| 6115332 | Apparatus for relocating, grouping and housing a plurality of recording media based on their recording medium-related information | Yasushi Matsumoto | 2000-09-05 |
| 5969645 | Key input method and circuit | — | 1999-10-19 |