Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8879765 | Hearing optimization device and hearing optimization method | Kikuo Aoki, Keisuke Oizumi, Keiichi Kato | 2014-11-04 |
| 7715579 | Tone control circuit for hearing aid and the like | Kenjiro Owada, Takashi Kuno | 2010-05-11 |
| 6761173 | Ear plug to be inserted into the external auditory canal | Takashi Kuno, Kenjiro Owada | 2004-07-13 |
| 4938062 | Barometric meter | Shuhei Shimizu, Shotaro Nakabayashi | 1990-07-03 |