Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4436521 | Process for producing dyed and anti-shrink treated wool | Oskar Annen, Karl Zesiger | 1984-03-13 |
| 4411665 | Dyeing process using alkoxylated fatty amines and polyamines as reserving agents | Emil Engeler | 1983-10-25 |
| 4285691 | Alkoxylated fatty amines and polyamines as reserving agents | Emil Engeler | 1981-08-25 |