Granted Patent
Utility
US 4,568,847 · App. 06/522,049
Collector-type D.C. machine with improved connections among collector segments and coils
Inventor:
Fritz Schmider
Patented Case
View Patent ↗
Granted: Feb 4, 1986
Filed: Aug 10, 1983
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.