Granted Patent
Utility
US 4,069,637 · App. 05/712,555
Tubular section boom
Inventor:
Arthur B. M. Braithwaite
Patented Case
View Patent ↗
Granted: Jan 24, 1978
Filed: Aug 9, 1976
Inventor
Arthur B. M. Braithwaite
Assignee (at issue)
Caterpillar Tractor Co.
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.