Granted Patent
Utility
US 4,649,932 · App. 06/600,273
Method and apparatus for deriving currents and potentials representative of the impedances of zones of a body
Inventor:
Denis N. Smith
Patented Case
View Patent ↗
Granted: Mar 17, 1987
Filed: Apr 13, 1984
Inventor
Denis N. Smith
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT CORPORATION
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.