Granted Patent
Utility
US 5,176,509 · App. 07/659,984
Axially compact small fan
Inventors:
Fritz Schmider, Edgar Zuckschwert
Patented Case
View Patent ↗
Granted: Jan 5, 1993
Filed: Feb 22, 1991
Inventors
Fritz Schmider
Edgar Zuckschwert
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.