Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4631412 | Ionization smoke detector | — | 1986-12-23 |
| 4366426 | Starting circuit for single phase electric motors | — | 1982-12-28 |
| 4245174 | Dual ionization chamber | John Mallory | 1981-01-13 |
| 4238675 | Optics for infrared intrusion detector | Donald F. Hawken | 1980-12-09 |
| 4205306 | Battery operated smoke detector electronics | — | 1980-05-27 |