Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5690093 | Ventilator controller with variably adjustable fan and light | Anthony L. Schrank, Chris Hentschel | 1997-11-25 |
| 5414409 | Alarm system for detecting an audio signal when glass breakage occurs | Christopher Hentschel | 1995-05-09 |
| 4949073 | Glass breakage detector with self-aligning housing | — | 1990-08-14 |