Granted Patent
Utility
US 6,536,847 · App. 09/902,382
Pick box for housing a mineral cutter pick
Inventors:
William Stephen Clapham, John Joseph Warren, Gunter Dlugosch, Angelo Weigelt
Patented Case
View Patent ↗
Granted: Mar 25, 2003
Filed: Jul 10, 2001
Inventors
William Stephen Clapham
John Joseph Warren
Gunter Dlugosch
Angelo Weigelt
Assignee (at issue)
HYDRA MINING TOOLS INTERNATIONAL LIMITED
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.