Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5189399 | Method of operating an ionization smoke alarm and ionization smoke alarm | — | 1993-02-23 |
| 5008559 | Method for operating an optical smoke detector and optical smoke detector for the method | — | 1991-04-16 |
| 4243981 | Ionization fire-signal device | — | 1981-01-06 |
| 4213046 | Ionization fire-signal device | — | 1980-07-15 |
| 4207487 | Electric machine | — | 1980-06-10 |