Granted Patent
Utility
US 4,535,679 · App. 06/307,919
Control valve for a brake booster
Inventor:
Oswald O. Kytta
Patented Case
View Patent ↗
Granted: Aug 20, 1985
Filed: Oct 2, 1981
Inventor
Oswald O. Kytta
Assignee (at issue)
Bendix 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.