Granted Patent
Utility
US 4,178,953 · App. 05/535,955
Fail safe bypass valve
Inventor:
Jack M. White
Patented Case
View Patent ↗
Granted: Dec 18, 1979
Filed: Dec 23, 1974
Inventor
Jack M. White
Assignee (at issue)
ACF Industries Incorporated
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.