Granted Patent
Utility
US 4,375,292 · App. 06/371,152
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Inventor:
Roger K. Ericson
Patented Case
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Granted: Mar 1, 1983
Filed: Apr 23, 1982
Inventor
Roger K. Ericson
Assignee (at issue)
REXNORD GMBH
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.