Granted Patent
Utility
US 4,925,544 · App. 07/303,653
Electrochemical sensor with solid phase electrolyte
Inventor:
Lionel S. Goldring
Patented Case
View Patent ↗
Granted: May 15, 1990
Filed: Feb 23, 1989
Inventor
Lionel S. Goldring
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.