Granted Patent
Utility
US 4,513,812 · App. 06/391,458
Heat sink for electronic devices
Inventors:
Georg Papst, Guenter Wrobel, Ulrich Koletzki
Patented Case
View Patent ↗
Granted: Apr 30, 1985
Filed: Jun 23, 1982
Inventors
Georg Papst
Guenter Wrobel
Ulrich Koletzki
Assignee (at issue)
Papst Motoren GmbH & Co KG
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.