Granted Patent
Utility
US 5,435,680 · App. 08/183,042
Screw drive construction
Inventor:
Armin Schuster
Patented Case
View Patent ↗
Granted: Jul 25, 1995
Filed: Jan 14, 1994
Inventor
Armin Schuster
Assignee (at issue)
ADOLF WÜRTH GMBH & CO. KG
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.