Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8884532 | Photo control for a luminaire | Dale C. Thomas, Hal Adair, N. Rodger Williamson, III | 2014-11-11 |
| 7345270 | Photocontrol with radio-controlled timer and a decoder | Dale C. Thomas | 2008-03-18 |
| 5747954 | Highway crossing guard mechanism controller | N. Rodgers Williamson, Jr. | 1998-05-05 |
| 5684461 | Sleep prevention device for a driver of a vehicle | — | 1997-11-04 |
| 5664744 | Railway highway crossing signal | James P. Chew, Santo A. DeFrancesco | 1997-09-09 |
| 5543596 | Highway crossing gate mechanism circuit contact | William H. Hodges, Jr., Paul Michael Evans | 1996-08-06 |
| 5502367 | Highway crossing control | — | 1996-03-26 |