Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4806905 | Transmitter for transmitting on a two-wire transmitting line | David L. McGowan, III | 1989-02-21 |
| 4797669 | Receiver | David L. McGowan, III, Arthur M. Olsen | 1989-01-10 |