Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4904459 | Process for working up dusts which are produced in the electrothermal production of phosphorus | Friedrich Kolkmann, Gunther Schimmel | 1990-02-27 |
JS
Johannes Scheffer
Overall (All Time): #3,896,929 of 4,157,543Top 95%
1
Patents All Time