Granted Patent
Utility
US 5,230,786 · App. 07/691,705
Silver-chloride reference electrode
Inventor:
Walter Preidel
Patented Case
View Patent ↗
Granted: Jul 27, 1993
Filed: Apr 26, 1991
Inventor
Walter Preidel
Assignee (at issue)
Siemens Aktiengesellschaft
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.