Granted Patent
Utility
US 4,137,909 · App. 05/820,838
Medical electrode
Inventor:
Ernet T. Hix
Patented Case
View Patent ↗
Granted: Feb 6, 1979
Filed: Aug 1, 1977
Inventor
Ernet T. Hix
Assignee (at issue)
NDM Co., Ltd.
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.