Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889702 | Process for removing metallic constituents from dust obtained during the electrothermal production of yellow phosphorus | Friedrich Kolkmann | 1989-12-26 |
KJ
Klaus Jodden
Overall (1989): #86,686 of 140,708Top 65%
1
Patents 1989