Granted Patent
Utility
US 4,520,245 · App. 06/536,305
Differential pressure operated electrical switch construction
Inventor:
Rolf H. Ochsner
Patented Case
View Patent ↗
Granted: May 28, 1985
Filed: Sep 27, 1983
Inventor
Rolf H. Ochsner
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.