Granted Patent
Utility
US 5,690,392 · App. 08/648,172
Water supply system for a mining machine
Inventor:
William S. Clapham
Patented Case
View Patent ↗
Granted: Nov 25, 1997
Filed: May 17, 1996
Inventor
William S. Clapham
Assignee (at issue)
Hydra Tools International PLC
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.