Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4795943 | High-pressure sodium vapor discharge lamp | Petrus H. Antonis, Ralf Schafer | 1989-01-03 |
LM
Lodewijk H. M. Meessen
Overall (1989): #83,028 of 140,708Top 60%
1
Patents 1989