Granted Patent
Utility
US 4,290,450 · App. 06/024,751
Fluid mixing valve
Inventor:
Wesley S. Swanson
Patented Case
View Patent ↗
Granted: Sep 22, 1981
Filed: Mar 28, 1979
Inventor
Wesley S. Swanson
Assignee (at issue)
Eaton Corporation
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.