Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5721529 | Individual smoke detector with stored range of acceptable sensitivity | David B. Lederer | 1998-02-24 |
| 5699043 | Individual smoke detector with sensitivity calibration and monitoring | David B. Lederer | 1997-12-16 |
| 5691699 | Security detector with optical data transmitter | Leigh Austin Laughlin | 1997-11-25 |
| 5552765 | Smoke detector with individually stored range of acceptable sensitivity | David B. Lederer | 1996-09-03 |
| 5543777 | Smoke detector with individual sensitivity calibration and monitoring | David B. Lederer | 1996-08-06 |