Granted Patent
Utility
US 4,755,692 · App. 07/060,134
Vital safety monitoring circuit
Inventor:
Harry C. Nagel
Patented Case
View Patent ↗
Granted: Jul 5, 1988
Filed: Jun 9, 1987
Inventor
Harry C. Nagel
Assignee (at issue)
American Standard Inc.
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.