Granted Patent
Utility
US 4,491,186 · App. 06/442,162
Automatic drilling process and apparatus
Inventor:
Robert L. Alder
Patented Case
View Patent ↗
Granted: Jan 1, 1985
Filed: Nov 16, 1982
Inventor
Robert L. Alder
Assignee (at issue)
SMITH INTERNATIONAL, 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.