Granted Patent
Utility
US 4,723,231 · App. 07/004,744
Source tunable array for ground roll reduction
Inventor:
John J. Sallas
Patented Case
View Patent ↗
Granted: Feb 2, 1988
Filed: Jan 7, 1987
Inventor
John J. Sallas
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.