Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5724431 | Zinc-air dry cell holder and hearing aid that uses it | Gordon Berkholcs | 1998-03-03 |
| 5606621 | Hybrid behind-the-ear and completely-in-canal hearing aid | Gordon Berkholcs | 1997-02-25 |