Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5999090 | Alarm sensor and antenna arrangement | Stephen Redfern, Paul Tyson | 1999-12-07 |
| 5563617 | Doppler microwave sensor | Stephen Redfern, Paul Tyson | 1996-10-08 |
| 5376943 | Moving vehicle transponder | David A. Williams | 1994-12-27 |