Granted Patent
Utility
US 5,135,363 · App. 07/724,840
Miniaturized direct current fan
Inventors:
Siegfried Harmsen, Rolf Muller, Gunter Wrobel
Patented Case
View Patent ↗
Granted: Aug 4, 1992
Filed: Jul 2, 1991
Inventors
Siegfried Harmsen
Rolf Muller
Gunter Wrobel
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.