Granted Patent
Utility
US 5,867,958 · App. 08/898,848
Easy drive concrete fastener system
Inventors:
Michael P. Ditka, Larry Reinhard
Patented Case
View Patent ↗
Granted: Feb 9, 1999
Filed: Jul 25, 1997
Inventors
Michael P. Ditka
Larry Reinhard
Assignee (at issue)
ILLINOIS TOOL WORKS INC.
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.