Granted Patent
Utility
US 5,772,514 · App. 08/713,781
Torque control device for rotary mine drilling machine
Inventor:
Richard E. Moore
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Sep 13, 1996
Inventor
Richard E. Moore
Assignee (at issue)
Duramax, 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.