Issued Patents All Time
Showing 26–39 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5973594 | Multiple optical designs for a multifunction sensor | Thomas James Batko, David F. Ellison | 1999-10-26 |
| D409936 | Low profile passive infrared sensor | Thomas James Batko, David F. Ellison | 1999-05-18 |
| 5877499 | Composite fresnel lens having array of lens segments providing long narrow detection range | — | 1999-03-02 |
| 5826957 | Housing with multiple fixed declination adjustment positions and living hinge connections | Joseph V. DeBartolo, Jr., Thomas J. Vigorito | 1998-10-27 |
| 5764146 | Multifunction occupancy sensor | Thomas James Batko, David F. Ellison | 1998-06-09 |
| 5561576 | Step down transformer power supply with short circuit protection | — | 1996-10-01 |
| 5457595 | Low-power relay operating circuit | — | 1995-10-10 |
| 5442178 | Cross-over field-of-view composite Fresnel lens for an infrared detection system | — | 1995-08-15 |
| 5416404 | Extremely low power zero crossing circuit | — | 1995-05-16 |
| 4778996 | Ceiling mounted passive infrared intrusion detector with pyramidal mirror | William Kahl | 1988-10-18 |
| 4772797 | Ceiling mounted passive infrared intrusion detector with prismatic window | William Kahl | 1988-09-20 |
| 4757204 | Ceiling mounted passive infrared intrusion detector with dome shaped lens | William Kahl | 1988-07-12 |
| 4484075 | Infrared intrusion detector with beam indicators | William G. Kahl, Jr. | 1984-11-20 |
| 4189843 | Pipe thread gauge | — | 1980-02-26 |