Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822372 | Processing for tanning leather | Frank Forster, Hermann Becker, Werner Lotz | 1989-04-18 |
| 4810252 | Process for tanning leather | Hermann Becker, Werner Lotz | 1989-03-07 |
KK
Karlfried Keller
Cassella Aktiengesellschaft: 1 patents #14 of 42Top 35%
Overall (1989): #22,954 of 140,708Top 20%
2
Patents 1989