Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847534 | High-pressure discharge lamp with torsionally wound electrode structure | by Friedrich J. de Haan, administrator | 1989-07-11 |
WD
Wilhelmus C. der Kinderen, deceased
Overall (1989): #44,489 of 140,708Top 35%
1
Patents 1989