Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4212646 | Process for the printing of mixed fabrics of polyester and cellulose fibers | Erich Feess, Willy Gronen | 1980-07-15 |
| 4212648 | Process for the printing of cellulose fiber fabrics | Erich Feess, Willy Gronen | 1980-07-15 |
| 4201547 | Process for the preparation of azo dyestuffs on fiber materials consisting of, or containing, cellulose fibers | Erich Feess, Hartmut Springer, Paul Karacsonyi, Willy Gronen | 1980-05-06 |
| 4195973 | Process for printing with developing dyes which employs having ether substituents derived from glycols, polyglycols, or alkoxy derivatives thereof | Hasso Hertel, Erich Feess, Paul Karacsonyi | 1980-04-01 |