Granted Patent
Utility
US 4,235,074 · App. 06/048,294
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Inventor:
William M. Larson
Patented Case
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Granted: Nov 25, 1980
Filed: Jun 13, 1979
Inventor
William M. Larson
Assignee (at issue)
Eaton Corporation
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.