Granted Patent
Utility
US 5,474,334 · App. 08/284,389
Coupling assembly
Inventor:
Jay M. Eppink
Patented Case
View Patent ↗
Granted: Dec 12, 1995
Filed: Aug 2, 1994
Inventor
Jay M. Eppink
Assignee (at issue)
Halliburton
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.