Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7427608 | Protection against and treatment of hearing loss | Donald Henderson, David G. Hangauer, Jr. | 2008-09-23 |
| 7129225 | Protection against and treatment of hearing loss | Donald Henderson, David G. Hangauer, Jr. | 2006-10-31 |