Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6724910 | Diaphragm stable through hygroscopic cycling | Thomas Paul Heed, Kirk R. Bristol | 2004-04-20 |
| 4568926 | Smoke detector | — | 1986-02-04 |
| 4420746 | Self-calibrating smoke detector and method | — | 1983-12-13 |
| 4288791 | Smoke detector and method | — | 1981-09-08 |
| 4266220 | Self-calibrating smoke detector and method | — | 1981-05-05 |
| 4249169 | Optical smoke detector | — | 1981-02-03 |
| 4237452 | Smoke detection system and method | — | 1980-12-02 |
| 4237453 | Smoke detection system and method | — | 1980-12-02 |
| 4206456 | Smoke detector | William F. Doherty | 1980-06-03 |