Granted Patent
Utility
US 4,601,491 · App. 06/543,590
Pipe connector
Inventors:
James L. Bell, Mark T. Thatcher, Brian K. Phillips, Norman Brammer, Thomas F. Sweeney
Patented Case
View Patent ↗
Granted: Jul 22, 1986
Filed: Oct 19, 1983
Inventors
James L. Bell
Mark T. Thatcher
Brian K. Phillips
Norman Brammer
Thomas F. Sweeney
Assignee (at issue)
Vetco Offshore, Inc.
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.