Granted Patent
Utility
US 5,577,808 · App. 08/414,680
Quarry miner
Inventor:
Jerry F. Gilbert
Patented Case
View Patent ↗
Granted: Nov 26, 1996
Filed: Apr 3, 1995
Inventor
Jerry F. Gilbert
Assignee (at issue)
Trencor, 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.