Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4622045 | Method of dyeing wool with acid dyestuffs | Josef Frauenknecht | 1986-11-11 |
| 4365903 | Lockable key with luminescent display for office typewriters and teleprinters | Heinz Thormann | 1982-12-28 |
| 4247290 | Process for dyeing mixed elastomeric and non-elastomeric fibers | Walter Knobel | 1981-01-27 |