Granted Patent
Utility
US 4,420,825 · App. 06/263,455
Element-sited beamformer
Inventors:
Robert L. Maynard, Samuel S. Ballard, Robert L. Townsend
Patented Case
View Patent ↗
Granted: Dec 13, 1983
Filed: May 15, 1981
Inventors
Robert L. Maynard
Samuel S. Ballard
Robert L. Townsend
Assignee (at issue)
Sanders GmbH
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.