Granted Patent
Utility
US 4,903,993 · App. 07/291,187
Tieback connector with two point interference fit
Inventor:
Norman Brammer
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Dec 28, 1988
Inventor
Norman Brammer
Assignee (at issue)
Vetco Gray, LLC
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.