Granted Patent
Utility
US 4,458,601 · App. 06/182,658
Speed control system for a pipeline inspection vehicle
Inventors:
John C. Braithwaite, Ian Smith
Patented Case
View Patent ↗
Granted: Jul 10, 1984
Filed: Aug 29, 1980
Inventors
John C. Braithwaite
Ian Smith
Assignee (at issue)
British Gas
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.