Granted Patent
Utility
US 4,586,405 · App. 06/756,501
Nut driver
Inventor:
Imre Berecz
Patented Case
View Patent ↗
Granted: May 6, 1986
Filed: Jul 19, 1985
Inventor
Imre Berecz
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.