Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4361733 | Hard-of-hearing aid appliance | Yozo Marutake, Yasuo Inaba, Kunihiko Fukuyama | 1982-11-30 |
| 4354061 | Sensing coil in hearing aid | Yozo Marutake, Takayuki KURITA | 1982-10-12 |