Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4323718 | Arc furnace roof | Otto Buhring, Jacob W. H. Groeneveld, Robert Queck, Heinrich Thome, Gerrit J. Willemsen | 1982-04-06 |
GD
Gerardus J. W. Dreessen
Overall (All Time): #4,067,798 of 4,157,543Top 100%
1
Patents All Time