Granted Patent
Utility
US 4,118,076 · App. 05/781,835
Control valve having reduced crack-open pressure
Inventor:
William M. Mild
Patented Case
View Patent ↗
Granted: Oct 3, 1978
Filed: Mar 28, 1977
Inventor
William M. Mild
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.