Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4999638 | Apparatus and method for synchronizing the signal averaging clock of a Loran C. receiver to the clock of a Loran C. transmitter | — | 1991-03-12 |
| 4736191 | Touch activated control method and apparatus | Karl E. Matzke | 1988-04-05 |