Granted Patent
Utility
US 5,111,137 · App. 07/605,289
Method and apparatus for the detection of leakage current
Inventors:
John M. Heumann, Vance R. Harwood
Patented Case
View Patent ↗
Granted: May 5, 1992
Filed: Oct 29, 1990
Inventors
John M. Heumann
Vance R. Harwood
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.