Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12249343 | Natural ear | Eric A. Freudenthal, Bryan E. Usevitch | 2025-03-11 |
| 11120816 | Natural ear | Eric A. Freudenthal, Bryan E. Usevitch | 2021-09-14 |
| 9773426 | Apparatus and method to facilitate singing intended notes | Eric A. Freudenthal, Bryan E. Usevitch | 2017-09-26 |