Granted Patent
Utility
US 5,127,764 · App. 07/690,664
Clip ring spread preventer
Inventor:
Mark E. Baer
Patented Case
View Patent ↗
Granted: Jul 7, 1992
Filed: Apr 24, 1991
Inventor
Mark E. Baer
Assignee (at issue)
SHOP VAC CORPORATION
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.