Granted Patent
Utility
US 4,362,164 · App. 06/186,074
Electronic pick-up device for transducing electrical energy and sound energy of the heart
Inventors:
Michael J. Little, Shi-Yin Wong
Patented Case
View Patent ↗
Granted: Dec 7, 1982
Filed: Sep 11, 1980
Inventors
Michael J. Little
Shi-Yin Wong
Assignee (at issue)
Hughes Aircraft Company
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.