Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864191 | Rhenium-containing electrode for a high-pressure sodium discharge lamp | Martinus H. A. Van De Weijer | 1989-09-05 |
JE
Joseph Franciscus Raymond Eijsermans
Overall (1989): #95,706 of 140,708Top 70%
1
Patents 1989