Granted Patent
Utility
US 4,796,923 · App. 07/076,029
Joints for tubular members
Inventors:
Brian D. Liggins, Timothy S. Round, Stuart J. Welch, Gordon F. Reynolds
Patented Case
View Patent ↗
Granted: Jan 10, 1989
Filed: Jul 21, 1987
Inventors
Brian D. Liggins
Timothy S. Round
Stuart J. Welch
Gordon F. Reynolds
Assignee (at issue)
British Steel 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.