Granted Patent
Utility
US 4,964,085 · App. 06/833,364
Non-contact borehole caliber measurement
Inventors:
Daniel F. Coope, John E. Fontenot
Patented Case
View Patent ↗
Granted: Oct 16, 1990
Filed: Feb 25, 1986
Inventors
Daniel F. Coope
John E. Fontenot
Assignee (at issue)
Baroid Technology, 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.