Granted Patent
Utility
US 4,473,125 · App. 06/442,280
Insert for drill bits and drill stabilizers
Inventors:
Larry S. Addudle, Donald E. Andrews
Patented Case
View Patent ↗
Granted: Sep 25, 1984
Filed: Nov 17, 1982
Inventors
Larry S. Addudle
Donald E. Andrews
Assignee (at issue)
Fansteel 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.