Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6251414 | Aqueous formulation for pretanning raw hides | Alain Lauton, Markus Hess, Alois Puntener | 2001-06-26 |
| 5427594 | Process for pickling raw hides | Alain Lauton, Markus Hess, Alois Puntener | 1995-06-27 |
| 5360453 | Process for pickling and pretanning raw hides | Alain Lauton, Markus Hess, Alois Puntener | 1994-11-01 |
| 5007941 | Process for dyeing leather: aqueous bath containing mixture of carbon black and acid dye, direct dye or metal complex dye | Bruno Martinelli, Markus Ghezzi | 1991-04-16 |