Granted Patent
Utility
US 4,159,796 · App. 05/809,571
Method for making a boom
Inventor:
Arthur B. M. Braithwaite
Patented Case
View Patent ↗
Granted: Jul 3, 1979
Filed: Jun 23, 1977
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.