Granted Patent
Utility
US 5,947,657 · App. 09/134,395
Drill jig assembly having hydraulic chuck and drill guide with pilot bore
Inventors:
Steve Lipohar, William C. Magill, William B. Tunis
Patented Case
View Patent ↗
Granted: Sep 7, 1999
Filed: Aug 14, 1998
Inventors
Steve Lipohar
William C. Magill
William B. Tunis
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.