Granted Patent
Utility
US 4,909,211 · App. 07/352,969
Barrel-type throttle valve for engine air intake
Inventors:
Valerie G. Caryer Cook, Robert Schmidt
Patented Case
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Granted: Mar 20, 1990
Filed: May 17, 1989
Inventors
Valerie G. Caryer Cook
Robert Schmidt
Assignee (at issue)
WALBRO LLC
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.