Granted Patent
Utility
US 4,548,442 · App. 06/558,784
Mobile mining machine and method
Inventors:
David B. Sugden, Bruce A. Waddell, James P. Kindsvater, Robert B. Moffat
Patented Case
View Patent ↗
Granted: Oct 22, 1985
Filed: Dec 6, 1983
Inventors
David B. Sugden
Bruce A. Waddell
James P. Kindsvater
Robert B. Moffat
Assignee (at issue)
Robbins, 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.