Granted Patent
Utility
US 4,574,807 · App. 06/585,761
Method and apparatus for pacing the heart employing external and internal electrodes
Inventors:
Carl E. Hewson, Paul F. Ridolpho
Patented Case
View Patent ↗
Granted: Mar 11, 1986
Filed: Mar 2, 1984
Inventors
Carl E. Hewson
Paul F. Ridolpho
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.