Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855140 | O-(O-ethyl-S-alkylphosphoryl)-O-(carbamyl)-pyrocatechol derivatives | Wolfgang Seppelt, Linhard Sproesser, Peter Hofmeister, Christoph Kuenast | 1989-08-08 |
SK
Siegfried Kersten
Overall (1989): #56,314 of 140,708Top 45%
1
Patents 1989