Granted Patent
Utility
US 4,311,194 · App. 06/067,779
Liner hanger and running and setting tool
Inventor:
Pat M. White
Patented Case
View Patent ↗
Granted: Jan 19, 1982
Filed: Aug 20, 1979
Inventor
Pat M. White
Assignee (at issue)
Otis Engineering 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.