Granted Patent
Utility
US 5,128,898 · App. 07/591,582
Method and apparatus for detecting orientation of downhole geophones
Inventors:
Britt Hill, Hanna Khalil, Robert Albers
Patented Case
View Patent ↗
Granted: Jul 7, 1992
Filed: Oct 2, 1990
Inventors
Britt Hill
Hanna Khalil
Robert Albers
Assignee (at issue)
Halliburton Geophysical Services, 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.