Granted Patent
Utility
US 5,109,171 · App. 07/522,603
Low-noise miniature electric motor
Inventor:
Fritz Schmider
Patented Case
View Patent ↗
Granted: Apr 28, 1992
Filed: May 11, 1990
Inventor
Fritz Schmider
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.