Granted Patent
Utility
US 4,196,751 · App. 05/649,273
Electric to fluid signal valve unit
Inventors:
Donn R. Fischer, Wesley W. Rineck
Patented Case
View Patent ↗
Granted: Apr 8, 1980
Filed: Jan 15, 1976
Inventors
Donn R. Fischer
Wesley W. Rineck
Assignee (at issue)
Johnson Controls, Inc.
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.