Granted Patent
Utility
US 4,833,907 · App. 07/128,624
Consolidated backshoe die for a tube bender machine
Inventor:
Samuel Grimaldo
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Dec 4, 1987
Inventor
Samuel Grimaldo
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.