Granted Patent
Utility
US 4,976,142 · App. 07/422,680
Borehole pressure and temperature measurement system
Inventor:
Kenneth Perales
Patented Case
View Patent ↗
Granted: Dec 11, 1990
Filed: Oct 17, 1989
Inventor
Kenneth Perales
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.