Granted Patent
Utility
US 4,597,499 · App. 06/622,533
Biased pin retainer block for a rotary coupling system
Inventor:
Richard M. Hanula
Patented Case
View Patent ↗
Granted: Jul 1, 1986
Filed: Jun 20, 1984
Inventor
Richard M. Hanula
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.