Granted Patent
Utility
US 4,459,119 · App. 06/237,542
Lock washer for spring type retainer rings
Inventor:
Gene Beijer
Patented Case
View Patent ↗
Granted: Jul 10, 1984
Filed: Feb 23, 1981
Inventor
Gene Beijer
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.