Granted Patent
Utility
US 4,745,876 · App. 06/800,085
Differential pressure responsive indicating device
Inventor:
James C. Whiting
Patented Case
View Patent ↗
Granted: May 24, 1988
Filed: Nov 21, 1985
Inventor
James C. Whiting
Assignee (at issue)
Facet Enterprises, Incorporated
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.