Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5097176 | High-pressure sodium discharge lamp having a color temperature of at least 2800.degree. K. | Johannes T. W. De Hair, Robertus A. J. Keijser, Monique M. F. Eerdekens | 1992-03-17 |
| 4970431 | High-pressure sodium discharge lamp with fins radially extending from the discharge vessel for controlling the wall temperature of the discharge vessel | Klaas Vegter | 1990-11-13 |
| 4409517 | High-pressure discharge lamp with envelope lead-through structure | Franciscus Guillaume Peter Sools, Ronald J. Campbell | 1983-10-11 |