Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4810536 | Method of impregnating | Bernhard Jansen, Hanns P. Muller, Roland Richter, Dietmar Schapel | 1989-03-07 |
| 4775385 | Process for dyeing leathers, water-soluble cationic polymers suitable for that purpose, and process for their preparation | Stephan Kleemann, Fritz Wahl | 1988-10-04 |
| 4750906 | Process for the retanning of mineral tanned leather | — | 1988-06-14 |
| 4699010 | High-temperature resistant elongation measuring system formed of ceramic materials | Ernst Klas, Gunther Schumacher, Dieter Stausebach, Alfred Zentis | 1987-10-13 |
| 4635765 | Adjustable hydraulic damper apparatus | — | 1987-01-13 |
| 4611614 | Apparatus for cleaning parts of processing machines from residues | — | 1986-09-16 |
| 4585811 | Reinforcing agents for elastomers, the production of reinforced elastomers and reinforced elastomers | Lothar Preis, Josef Esser, Hans Magg | 1986-04-29 |
| 4510180 | Method of coating geological formations as well as air- and fire barriers | Wolfgang Cornely, Heinz Esser | 1985-04-09 |
| 4501516 | Anchoring of tension members | Bernhard Kotulla, Martin Weiser, Jurgen Faltin, Lothar Preis, Eberhard Born | 1985-02-26 |
| 4443132 | Anchoring of tension members | Bernhard Kotulla, Martin Weiser, Jurgen Faltin, Lothar Preis, Eberhard Born | 1984-04-17 |
| 4326073 | Production of anhydrous or substantially anhydrous formic acid | Dieter Wolf, Ulrich Block, Hartmut Schoenmakers, Kaspar Bott, Gerd Kaibel | 1982-04-20 |
| 4294666 | Process for the manufacture of 4,4'-diphenyl-methane diisocyanate and a mixture of diphenyl-methane diisocyanate isomers containing a small amount of uretdiones and hydrolyzable chlorine | Hans J. Astheimer, Horst Brandtstaedter, Rainer Ohlinger, Willy van Pee, Jaak Van Steen +2 more | 1981-10-13 |
| 4273476 | Reinforcement of armored earth work constructions | Bernhard Kotulla, Hans-Joachim Haas, Martin Weiser, Rolf Forster, Lothar Preis | 1981-06-16 |