Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE33920 | Smoke detector having variable level sensitivity | William P. Tanguay | 1992-05-12 |
| 4792797 | Smoke detector having variable level sensitivity | William P. Tanguay | 1988-12-20 |