Granted Patent
Utility
US 4,781,194 · App. 06/466,629
Heart pacemaker
Inventor:
Hakan Elmqvist
Patented Case
View Patent ↗
Granted: Nov 1, 1988
Filed: Feb 15, 1983
Inventor
Hakan Elmqvist
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.