Granted Patent
Utility
US 4,535,776 · App. 06/560,712
Cardiac pacemaker with two unipolar electrodes
Inventors:
Hans Strandberg, Hans Andersen
Patented Case
View Patent ↗
Granted: Aug 20, 1985
Filed: Dec 12, 1983
Inventors
Hans Strandberg
Hans Andersen
Assignee (at issue)
Siemens Aktiengesellschaft
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.