Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4543128 | Fillers dyed with polycationic dyestuffs useful for coloring paper and non-woven fabrics | Walter Portmann | 1985-09-24 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4543128 | Fillers dyed with polycationic dyestuffs useful for coloring paper and non-woven fabrics | Walter Portmann | 1985-09-24 |