Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12405597 | Machine tool | TAKESHI IKEGAYA, Koichiro SHIGAMA | 2025-09-02 |
| D607437 | Speaker | — | 2010-01-05 |
| D598894 | Earphone | Mitsuhiro Masuda, Eiji Matsuyama | 2009-08-25 |
| 7551748 | Earphone | Eiji Matsuyama, Hajime Kitamura, Isao Fushimi, Masayoshi Sugiyama | 2009-06-23 |
| D567217 | Earphone | Mitsuhiro Masuda, Eiji Matsuyama | 2008-04-22 |
| D490399 | Earphone with microphone | Isao Fushimi | 2004-05-25 |