Granted Patent
Utility
US 5,879,057 · App. 08/745,459
Horizontal remote mining system, and method
Inventors:
Jeffrey J. Schwoebel, Carl W. Smith, William J. Peters
Patented Case
View Patent ↗
Granted: Mar 9, 1999
Filed: Nov 12, 1996
Inventors
Jeffrey J. Schwoebel
Carl W. Smith
William J. Peters
Assignee (at issue)
Amvest Corporation
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.