Granted Patent
Utility
US 5,818,243 · App. 08/859,585
Impedance meter
Inventor:
Hideki Wakamatsu
Patented Case
View Patent ↗
Granted: Oct 6, 1998
Filed: May 20, 1997
Inventor
Hideki Wakamatsu
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.