Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5978474 | Coin telephone protection device | Daniel W. Macauley, Robert A. Till, Jr., Ronald L. Wild | 1999-11-02 |
| 4539552 | Digital-to-analog converter | Paul C. Davis, Joseph J. Nahas, Dale H. Nelson, DeWitt G. Ong, Brian Albert Wittman | 1985-09-03 |
| 4352958 | Electronically-switched multifrequency generator with transducer control | Paul C. Davis, Joseph J. Nahas, Dale H. Nelson, DeWitt G. Ong, Brian Albert Wittman | 1982-10-05 |
| 4332984 | Active speech network circuit for a telephone set | Paul C. Davis, Kenneth F. Sodomsky, Dennis L. Whitson | 1982-06-01 |