Granted Patent
Utility
US 4,239,060 · App. 06/045,455
Automatic air inlet and outlet valve assembly having upper chamber opening
Inventors:
Patricia S. Stoller, John A. Krug, Gerald D. Garner
Patented Case
View Patent ↗
Granted: Dec 16, 1980
Filed: Jun 4, 1979
Inventors
Patricia S. Stoller
John A. Krug
Gerald D. Garner
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.