Granted Patent
Utility
US 5,795,032 · App. 08/664,685
Mining machine with multiple propulsion members
Inventor:
Joseph J. Zimmerman
Patented Case
View Patent ↗
Granted: Aug 18, 1998
Filed: Jun 17, 1996
Inventor
Joseph J. Zimmerman
Assignee (at issue)
Joy MM Delaware, 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.