Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5103137 | Anti-cycling device for high pressure sodium lamps | Frederick H. Blake, Arthur G. Collin | 1992-04-07 |
| 5055669 | Constant-current light-sensing system | Frederick H. Blake | 1991-10-08 |
| 5039853 | Constant-current light-sensing system and improved sensor housing | Frederick H. Blake | 1991-08-13 |