Granted Patent
Utility
US 6,463,711 · App. 09/370,273
Construction hanger
Inventor:
Gerald Callies
Patented Case
View Patent ↗
Granted: Oct 15, 2002
Filed: Aug 9, 1999
Inventor
Gerald Callies
Assignee (at issue)
United Steel Products 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.