Granted Patent
Utility
US 4,249,601 · App. 06/009,861
Hydraulic running tool for liner hangers
Inventor:
Pat M. White
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Feb 6, 1979
Inventor
Pat M. White
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.