Granted Patent
Utility
US 4,401,964 · App. 06/254,378
Combined temperature responsive valve construction and electrical switch construction and method of making the same
Inventor:
Frank Payne
Patented Case
View Patent ↗
Granted: Aug 30, 1983
Filed: Apr 15, 1981
Inventor
Frank Payne
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.