Granted Patent
Utility
US 4,338,736 · App. 06/278,509
Retaining pin assembly for earthworking tool
Inventor:
Michael T. Radigan
Patented Case
View Patent ↗
Granted: Jul 13, 1982
Filed: Mar 16, 1981
Inventor
Michael T. Radigan
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.