Patents per Year
Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 6895345 | Portable hearing-related analysis system | Jeffrey C. Erdahl, David A. Preves | 2005-05-17 | $941,000 |
| 6647345 | Portable hearing-related analysis system | Jeffrey C. Erdahl, David A. Preves | 2003-11-11 | $2,657,000 |
| 6366863 | Portable hearing-related analysis system | Jeffrey C. Erdahl, David A. Preves | 2002-04-02 | $5,739,000 |