Granted Patent
Utility
US 5,126,980 · App. 07/646,967
Self-orienting vertically sensitive accelerometer
Inventors:
John J. Sallas, Jack Gamill Clemens
Patented Case
View Patent ↗
Granted: Jun 30, 1992
Filed: Jan 28, 1991
Inventors
John J. Sallas
Jack Gamill Clemens
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.