Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873471 | High frequency ballast for gaseous discharge lamps | Thomas E. Dean, William H. Henrich, David Matthew Fischer, Herbert E. Pietsch | 1989-10-10 |
| 4400688 | Method and apparatus for communication over electric power lines | Reed H. Johnston, Dennis C. Jeffreys, Albert W. Welz, Jr. | 1983-08-23 |
| 4218655 | Method and apparatus for transmitting intelligence over a carrier wave | Reed H. Johnston, Dennis C. Jeffreys | 1980-08-19 |