Granted Patent
Utility
US 4,960,133 · App. 07/273,928
Esophageal electrode
Inventor:
Carl E. Hewson
Patented Case
View Patent ↗
Granted: Oct 2, 1990
Filed: Nov 21, 1988
Inventor
Carl E. Hewson
Assignee (at issue)
Brunswick Manufacturing Co., 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.