Granted Patent
Utility
US 5,325,931 · App. 08/113,568
Chuck assembly for a drill box of a mine drill
Inventor:
Gerald L. Woods
Patented Case
View Patent ↗
Granted: Jul 5, 1994
Filed: Aug 27, 1993
Inventor
Gerald L. Woods
Assignee (at issue)
KENNAMETAL 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.