Granted Patent
Utility
US 4,242,082 · App. 05/936,112
Fluid flow sensing switch device
Inventors:
Charles D. Branson, Roy C. Demi
Patented Case
View Patent ↗
Granted: Dec 30, 1980
Filed: Aug 23, 1978
Inventors
Charles D. Branson
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.