Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4348514 | Polyamines containing urea groups | Gunter Kolb, Wolfgang Lehmann, Gunther Cramm, Friedhelm Muller, Janos Muszik | 1982-09-07 |
| 4319019 | Polyamines containing amide groups | Wolfgang Lehmann, Friedhelm Muller, Gunther Cramn, Knut Hammerstrom | 1982-03-09 |