Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4958371 | Method and apparatus for determining when a telephone handset is off-hook | Matthew F. Kern, Russell J. Welsh, John D. Fourdraine | 1990-09-18 |
| 4912552 | Distributed monitoring system | Arthur Webb Allison, III, William H. Forlines, Carl B. Gipson, Matthew F. Kern, David M. Myers | 1990-03-27 |
| 4633302 | Video cassette recorder adapter | — | 1986-12-30 |
| 4630313 | Cable sensor for sensing a DC signal from a cable headend | — | 1986-12-16 |