Granted Patent
Utility
US 5,170,803 · App. 07/589,995
Esophageal displacement electrode
Inventors:
Carl E. Hewson, John R. Hewson
Patented Case
View Patent ↗
Granted: Dec 15, 1992
Filed: Sep 28, 1990
Inventors
Carl E. Hewson
John R. Hewson
Assignee (at issue)
Brunswick Biomedical Technologies, 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.