Granted Patent
Utility
US 4,298,970 · App. 06/065,475
Borehole acoustic telemetry system synchronous detector
Inventors:
E. Neil Shawhan, Octavio A. Vela, Miles A. Smither
Patented Case
View Patent ↗
Granted: Nov 3, 1981
Filed: Aug 10, 1979
Inventors
E. Neil Shawhan
Octavio A. Vela
Miles A. Smither
Assignee (at issue)
Sperry-Sun, 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.