Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6579432 | Protection of gas communication in an electrochemical sensor | — | 2003-06-17 |
| 6129825 | Electrochemical gas sensor | Wenfeng Peng | 2000-10-10 |
| 6099708 | Three-electrode electrochemical gas sensor | Wenfeng Peng | 2000-08-08 |
| 5572820 | Emergency kit | — | 1996-11-12 |
| 5290639 | Battery socket for smoke detector | — | 1994-03-01 |
| D335771 | Combination snow brush and ice scraper | Edward W. Adair, William F. Mallory | 1993-05-25 |
| D307874 | Door/window intrusion detector transmitter | — | 1990-05-15 |
| D307875 | Perimeter intrusion detector transmitter | — | 1990-05-15 |
| D307517 | Combined floor brush head and squeegee | Edward W. Adair, William F. Mallory | 1990-05-01 |
| D306704 | Transmitter module | — | 1990-03-20 |
| D306705 | Central monitor | — | 1990-03-20 |
| 4821027 | Voice interactive security system | Thomas A. D. Burgmann, Gary Lennartz | 1989-04-11 |
| 4581606 | Central monitor for home security system | — | 1986-04-08 |
| D277558 | Smoke detecting photoelectric sensing chamber | — | 1985-02-12 |
| D271089 | Smoke detector cover | — | 1983-10-25 |
| 4321466 | Sensitivity test system for photoelectric smoke detector by changing light source intensity | Zbignew W. Turlej | 1982-03-23 |
| D260378 | Ionization chamber for an electronic smoke detector | — | 1981-08-25 |
| 4245174 | Dual ionization chamber | Zbigniew W. Turlej | 1981-01-13 |