Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7633027 | Switch mechanism usable underwater | Naoki Matsumoto, Tsuyoshi Hirabayashi | 2009-12-15 |
| 7598465 | Switch mechanism usable underwater | Tsuyoshi Hirabayashi, Ikko Mori | 2009-10-06 |