Granted Patent
Utility
US 4,409,930 · App. 06/256,413
Venting a liquid supply system
Inventors:
Cecil T. Bury, Andrew Holmes
Patented Case
View Patent ↗
Granted: Oct 18, 1983
Filed: Apr 22, 1981
Inventors
Cecil T. Bury
Andrew Holmes
Assignee (at issue)
David Brown Tractors Ltd.
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.