Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4800319 | Low-pressure mercury vapor discharge lamp | Johannes Trudo Cornelis Van Kemenade, Everhardus G. Berns | 1989-01-24 |
JH
Johannes T. W. De Hair
Overall (1989): #95,905 of 140,708Top 70%
1
Patents 1989