Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6307200 | Passive infrared sensor apparatus and method with DC offset compensation | Keith D. Kuhnly, Paul G. Saldin | 2001-10-23 |
| 6204760 | Security system for a building complex having multiple units | — | 2001-03-20 |
| 6114955 | System and method for antenna failure detection | John Charais | 2000-09-05 |
| 5872512 | Apparatus and method for reducing errors in a battery operated sensing circuit | Gerald M. Kackman | 1999-02-16 |
| 5038328 | Band pass filter | — | 1991-08-06 |
| 4864636 | Crystal controlled transmitter | — | 1989-09-05 |
| 4855713 | Learn mode transmitter | — | 1989-08-08 |
| D299422 | Combined annunciator and telephone jack wall plate and a junction box therefor | William W. Williamson | 1989-01-17 |
| 4737770 | Security system with programmable sensor and user data input transmitters | Jon R. Nelson, William W. Williamson | 1988-04-12 |
| 4614945 | Automatic/remote RF instrument reading method and apparatus | Jon R. Nelson | 1986-09-30 |