Granted Patent
Utility
US 4,785,668 · App. 07/038,134
Drill collar tester
Inventor:
Dominick A. Pagano
Patented Case
View Patent ↗
Granted: Nov 22, 1988
Filed: Apr 14, 1987
Inventor
Dominick A. Pagano
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.