Issued Patents All Time
Showing 76–81 of 81 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4298702 | Process for the manufacture of flame retardant polystyrene foams | Klaus Hahn, Klaus Hinselmann, Klaus Halbritter, Walter Rebafka | 1981-11-03 |
| 4279742 | Method of and apparatus for the flotation of mineral raw materials | Rumen V. Ivanov, Dobrin V. Nikolov, Ulrich Bilsing, Manfred Schmidt | 1981-07-21 |
| 4272583 | Flameproofed expandable styrene polymers | Klaus Hahn, Herbert Naarmann, Klaus Penzien | 1981-06-09 |
| 4218511 | Self-extinguishing, expandable styrene polymers | Klaus Hahn, Manfred Walter, Karl Stange | 1980-08-19 |
| 4199226 | Laser transmitting and receiving device | Claude Voumard, René Salathe | 1980-04-22 |
| 4190547 | Non-flammable insulating material | Harald Mahnke, Juergen Nieberle, Volker Trautz | 1980-02-26 |