Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9830127 | Electrolarynx control button arrangement with improved frequency control | Clifford Jay Griffin | 2017-11-28 |
| 9561099 | Electrolarynx control button arrangement | Clifford Jay Griffin | 2017-02-07 |
| 9336795 | Speech therapy system and method with loudness alerts | Clifford Jay Griffin, Karen Griffin | 2016-05-10 |