Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5527985 | Process for recycling waste sulfuric acid | Karl-Heinz Funken, Oliver Weinmann, Rudolf Sizmann | 1996-06-18 |
| 4953361 | Process for the operation of a generator absorption heat pump heating installation for space heating, water heating, etc. and generator absorption heat pump heating installation | Dieter Stehmeier, Heinz-Bernd Grabenhenrich | 1990-09-04 |
| 4368623 | Method and apparatus for use of heat taken up at low temperature | Heinrich Trumper, Dieter Stehmeier | 1983-01-18 |