Granted Patent
Utility
US 4,047,591 · App. 05/564,932
Air gun monitoring and synchronizing method and apparatus
Inventors:
Phillip W. Ward, Robert C. Donald, Arthur E. Leerskov, Jr.
Patented Case
View Patent ↗
Granted: Sep 13, 1977
Filed: Apr 3, 1975
Inventors
Phillip W. Ward
Robert C. Donald
Arthur E. Leerskov, Jr.
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.