Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7831055 | Presence activated hearing assistive system | Melvin D. Frerking | 2010-11-09 |
| 7787648 | Active cancellation hearing assistance device | Melvin D. Frerking, Philip R. Specht | 2010-08-31 |
| 7783067 | System and method for enhancing the inductive coupling between a hearing aid operating in telecoil mode and a communication device | Melvin D. Frerking | 2010-08-24 |
| 7715853 | Terrestrial repeater system for use with craft-mounted base stations | Melvin D. Frerking, David Grant Shively | 2010-05-11 |
| 7620429 | Hearing assistive system with low power interface | Melvin D. Frerking | 2009-11-17 |