Granted Patent
Utility
US 6,694,034 · App. 09/752,806
Transmission detection and switch system for hearing improvement applications
Inventors:
Stephen D. Julstrom, Elmer V. Carlson, Norman P. Matzen, Robert B. Schulein, Willem Soede
Patented Case
View Patent ↗
Granted: Feb 17, 2004
Filed: Dec 28, 2000
Inventors
Stephen D. Julstrom
Elmer V. Carlson
Norman P. Matzen
Robert B. Schulein
Willem Soede
Assignee (at issue)
ETYMOTIC RESEARCH, 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.