Granted Patent
Utility
US 5,522,647 · App. 08/328,642
Continuous highwall mining machine with armless conveyor
Inventors:
John J. Sartaine, Jon C. Blackstock, John A. Baird, Jr., Ian T. Carr
Patented Case
View Patent ↗
Granted: Jun 4, 1996
Filed: Oct 25, 1994
Inventors
John J. Sartaine
Jon C. Blackstock
John A. Baird, Jr.
Ian T. Carr
Assignee (at issue)
Mining Technologies, 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.