Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4938779 | Chrome tanning of leather with reduced waste of chromium | Hans-Herbert Friese, Emil Ruscheinsky | 1990-07-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4938779 | Chrome tanning of leather with reduced waste of chromium | Hans-Herbert Friese, Emil Ruscheinsky | 1990-07-03 |