Granted Patent
Utility
US 4,951,810 · App. 07/485,385
Fluid control device for electrical switch unit
Inventor:
Charles J. Everett
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Feb 26, 1990
Inventor
Charles J. Everett
Assignee (at issue)
ROBERTSHAW CONTROLS COMANY
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.