Granted Patent
Utility
US 4,239,059 · App. 06/014,462
Automatic air inlet and outlet valve assembly
Inventors:
Patricia S. Stoller, Gerald D. Garner, John A. Krug
Patented Case
View Patent ↗
Granted: Dec 16, 1980
Filed: Feb 23, 1979
Inventors
Patricia S. Stoller
Gerald D. Garner
John A. Krug
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.