Granted Patent
Utility
US 4,145,091 · App. 05/838,371
Dual relay control valve having integral solenoid valve
Inventors:
Richard C. Bueler, Dennis M. McWilliams
Patented Case
View Patent ↗
Granted: Mar 20, 1979
Filed: Sep 30, 1977
Inventors
Richard C. Bueler
Dennis M. McWilliams
Assignee (at issue)
Wagner Electric 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.