Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9190960 | Audio power amplifier | Robert A. Ponto | 2015-11-17 |
| 8903099 | End of branch module system | Robert A. Ponto, John D. Johnson, William Blake Brown | 2014-12-02 |
| 8077877 | Courtesy announcement system and method of using | Kenneth A. Tench, Jody W. Green | 2011-12-13 |
| 7694325 | Information broadcasting system | Kenneth A. Tench, Anthony William Simpson, John D. Johnson | 2010-04-06 |
| 7602282 | Audio system end of line load module providing a load on the audio circuit in response to a test signal | Robert A. Ponto | 2009-10-13 |
| 4571554 | Balanced amplifier device | Robert A. Ponto | 1986-02-18 |
| 4374300 | Sound mixer devices | Robert A. Ponto | 1983-02-15 |
| 4359600 | Programable low impedance digital attenuators | Robert A. Ponto | 1982-11-16 |
| 4359602 | Multiple input audio program system | Robert A. Ponto | 1982-11-16 |