Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4765875 | Preparation of sulfonated lubricating agents for leather and furs | Wolf-Dieter Willmund, Friedrich Pieper, Jochen Heidrich | 1988-08-23 |
| 4654042 | Sulfonated lubricating agents for leather and furs process therefore | Wolf-Dieter Willmund, Friedrich Pieper, Jochen Heidrich | 1987-03-31 |
| 4309176 | Process for the oiling and impregnation of leather and pelts | Hans-Herbert Friese, Uwe Ploog, Emil Ruscheinsky | 1982-01-05 |