Granted Patent
Utility
US 5,957,645 · App. 08/961,626
Spiral drive system for threaded fasteners
Inventor:
W. Dodd Stacy
Patented Case
View Patent ↗
Granted: Sep 28, 1999
Filed: Oct 31, 1997
Inventor
W. Dodd Stacy
Assignee (at issue)
PHILLIPS SCREW COMPANY
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.