Granted Patent
Utility
US 4,356,625 · App. 06/186,698
Fluid flow sensing switch device--method of making
Inventor:
Roy C. Demi
Patented Case
View Patent ↗
Granted: Nov 2, 1982
Filed: Sep 12, 1980
Inventor
Roy C. Demi
Assignee (at issue)
ROBERTSHAW CONTROLS PRIVATE LIMITED
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.