Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9830127 | Electrolarynx control button arrangement with improved frequency control | Mark Andrew Robertson | 2017-11-28 |
| 9561099 | Electrolarynx control button arrangement | Mark Andrew Robertson | 2017-02-07 |