Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888581 | Pressure sensitive security system for tracking motion over a surface | — | 1989-12-19 |
| 4875029 | Suppressed transient uniform detection sensitivity pir detector | Gerard G. Stelmack, Charles Boulos | 1989-10-17 |