Granted Patent
Utility
US 4,453,605 · App. 06/259,182
Drill bit and method of metallurgical and mechanical holding of cutters in a drill bit
Inventor:
Lot William Short, Jr.
Patented Case
View Patent ↗
Granted: Jun 12, 1984
Filed: Apr 30, 1981
Inventor
Lot William Short, Jr.
Assignee (at issue)
NL Industries, 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.