Granted Patent
Utility
US 6,691,487 · App. 10/005,663
Apparatus for reinforcing a portion of a metal joist adjacent an opening therethrough and methods for forming reinforced openings in metal support members
Inventor:
Larry Randall Daudet
Patented Case
View Patent ↗
Granted: Feb 17, 2004
Filed: Nov 8, 2001
Inventor
Larry Randall Daudet
Assignee (at issue)
Dietrich Industries, 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.