Granted Patent
Utility
US 4,569,501 · App. 06/614,543
Cambered truss header for a shoring structure
Inventor:
Robert McCracken
Patented Case
View Patent ↗
Granted: Feb 11, 1986
Filed: May 29, 1984
Inventor
Robert McCracken
Assignee (at issue)
Economy Forms Corporation
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.