Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D352120 | Reflector lamp with neck extender | Harold L. Hough, Peter R. Gagnon, Joseph P. Gallant, Arnold E. Westlund, Jr. | 1994-11-01 |
| D352121 | Reflector lamp with neck extender | Harold L. Hough, Peter R. Gagnon, Joseph P. Gallant, Arnold E. Westlund, Jr. | 1994-11-01 |
| 5296780 | Arc discharge lamp having cementless right-angle base members | Harold L. Hough | 1994-03-22 |
| 5294865 | Lamp with integrated electronic module | — | 1994-03-15 |
| 5276379 | Arc discharge lamp having cementless base members | Harold L. Hough | 1994-01-04 |
| 5254901 | Neck extender for a reflector lamp | Harold L. Hough, Peter R. Gagnon | 1993-10-19 |
| 5210461 | Arc discharge lamp containing mechanism for extinguishing arc at end-of-life | Robert Y. Pai, Harold L. Hough | 1993-05-11 |
| 5173639 | Thermal switch assembly for electric lamps | — | 1992-12-22 |
| 5082356 | Temperature control apparatus for controlling metallic vapor pressure in a closed cell | Harold L. Hough, Philip E. Moskowitz | 1992-01-21 |
| 4973881 | Automatic shut-off device for an electric lamp | Harold L. Hough | 1990-11-27 |
| 4937487 | Picture element lamp assembly for information display system | Ronald G. Blaisdell, Harold L. Hough | 1990-06-26 |
| 4868722 | Headlamp assembly | — | 1989-09-19 |
| 4779021 | Electric lamp with improved self-mounting frame member | — | 1988-10-18 |
| 4772989 | Motor vehicle headlight module | — | 1988-09-20 |
| 4660906 | Lamp holder assembly having rotatable base shell | — | 1987-04-28 |
| 4654557 | Lamp holder assembly having rotatable base | — | 1987-03-31 |
| 4624513 | Lamp holder assembly having rotatable base shell | — | 1986-11-25 |
| 4485331 | Fluorescent lamp holder | Harold L. Hough | 1984-11-27 |
| D272098 | Fluorescent lamp or the like | Harold L. Hough | 1984-01-03 |
| 4406969 | Circular fluorescent lamp holder | Harold L. Hough | 1983-09-27 |
| 4405877 | Variably positional lamp holder assembly | Harold L. Hough | 1983-09-20 |
| 4219870 | Front loading projection unit | Harold L. Hough | 1980-08-26 |