Granted Patent
Utility
US 5,272,986 · App. 08/043,983
Towing swivel for pipe inspection or other vehicle
Inventor:
David Smart
Patented Case
View Patent ↗
Granted: Dec 28, 1993
Filed: Apr 7, 1993
Inventor
David Smart
Assignee (at issue)
BRITISH GAS PLC
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.