Granted Patent
Utility
US 4,552,392 · App. 06/574,321
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Inventor:
Michael E. Morello
Patented Case
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Granted: Nov 12, 1985
Filed: Jan 27, 1984
Inventor
Michael E. Morello
Assignee (at issue)
Caterpillar Tractor Co.
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.