Granted Patent
Utility
US 4,304,239 · App. 06/128,007
Esophageal probe with balloon electrode
Inventor:
Alfred R. Perlin
Patented Case
View Patent ↗
Granted: Dec 8, 1981
Filed: Mar 7, 1980
Inventor
Alfred R. Perlin
Assignee (at issue)
The Kendall Company LP
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.