Granted Patent
Utility
US 4,397,505 · App. 06/244,517
Control valve
Inventor:
Herbert L. Linkner, Jr.
Patented Case
View Patent ↗
Granted: Aug 9, 1983
Filed: Mar 16, 1981
Inventor
Herbert L. Linkner, Jr.
Assignee (at issue)
KELSEY-HAYES-COMPANY
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.