Granted Patent
Utility
US 4,484,637 · App. 06/004,957
Positioning control system for rock drill support apparatus
Inventor:
James R. Mayer
Patented Case
View Patent ↗
Granted: Nov 27, 1984
Filed: Jan 19, 1979
Inventor
James R. Mayer
Assignee (at issue)
Cooper Industries Holdings
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.