Granted Patent
Utility
US 3,972,020 · App. 05/531,563
Transformerless input for seismic data acquisition system
Inventors:
Paul E. Carroll, Warren V. Moore, William C. Voigt
Patented Case
View Patent ↗
Granted: Jul 27, 1976
Filed: Dec 11, 1974
Inventors
Paul E. Carroll
Warren V. Moore
William C. Voigt
Assignee (at issue)
Texas Instruments Incorporated
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.