Granted Patent
Utility
US 4,763,655 · App. 07/062,707
Frequency-controlled heart pacemaker
Inventors:
Alexander Wirtzfeld, Karl Stangl, Roland Heinze
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: Jun 16, 1987
Inventors
Alexander Wirtzfeld
Karl Stangl
Roland Heinze
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.