Granted Patent
Utility
US 5,938,288 · App. 08/849,876
Automatic control system and method for a machine used for excavating drifts, tunnels, stopes, or caverns
Inventors:
Jacques Andre Saint-Pierre, Everett James Henderson, Jeffrey Nicholas Repski, Guy Chevrette, Peter Heinrich Hennecke, Wilfried Piefenbrink, Werner Hensgens
Patented Case
View Patent ↗
Granted: Aug 17, 1999
Filed: Sep 5, 1997
Inventors
Jacques Andre Saint-Pierre
Everett James Henderson
Jeffrey Nicholas Repski
Guy Chevrette
Peter Heinrich Hennecke
Wilfried Piefenbrink
Werner Hensgens
Assignees (at issue)
HDRK Mining Research Limited
Wirth Maschinen-und Bohrgerate-Fabrik GmbH
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.