Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D274506 | Unipolar chamber for an ionization smoke detector | — | 1984-07-03 |
| D270625 | Unipolar chamber for ionization smoke detector | — | 1983-09-20 |
| 4374329 | Smoke detector with test apparatus | George A. Schoenfelder, Gerald D. Rork | 1983-02-15 |