Granted Patent
Utility
US 4,445,800 · App. 06/324,619
Wrist pin
Inventor:
Raymond Walker
Patented Case
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Granted: May 1, 1984
Filed: Nov 24, 1981
Inventor
Raymond Walker
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.