Granted Patent
Utility
US 4,805,621 · App. 07/061,549
Apparatus for measuring impedance of body tissue
Inventors:
Roland Heinze, Karl Stangl
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Jun 15, 1987
Inventors
Roland Heinze
Karl Stangl
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.