Granted Patent
Utility
US 4,858,610 · App. 07/157,084
Detection of cardiac evoked potentials
Inventors:
Frank Callaghan, Edward A. Schroeppel
Patented Case
View Patent ↗
Granted: Aug 22, 1989
Filed: Feb 8, 1988
Inventors
Frank Callaghan
Edward A. Schroeppel
Assignee (at issue)
Telectronic SA
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.