Granted Patent
Utility
US 6,334,285 · App. 09/389,771
Hanger for mounting to I-beams
Inventor:
Kraig A. Kirschner
Patented Case
View Patent ↗
Granted: Jan 1, 2002
Filed: Sep 2, 1999
Inventor
Kraig A. Kirschner
Assignee (at issue)
Automatic Fire Control, 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.