Granted Patent
Utility
US 4,657,427 · App. 06/707,459
System of coupling of the head of a counter-angle to the body of counter-angle
Inventor:
Jacques Pernot
Patented Case
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Granted: Apr 14, 1987
Filed: Mar 1, 1985
Inventor
Jacques Pernot
Assignee (at issue)
Micro-Mega
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.