Granted Patent
Utility
US 6,612,803 · App. 09/506,472
Positioning cradle for mine roof supports
Inventors:
Clifford A. McCartney, William A. Anderson
Patented Case
View Patent ↗
Granted: Sep 2, 2003
Filed: Feb 17, 2000
Inventors
Clifford A. McCartney
William A. Anderson
Assignee (at issue)
Strata Products (USA), 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.