Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4331901 | Electric incandescent lamp | Bertus de Vrijer, Leonard C. H. Eijkelenboom | 1982-05-25 |
JR
Jan de Ridder
Overall (1982): #56,583 of 81,411Top 70%
1
Patents 1982