Granted Patent
Utility
US 4,457,336 · App. 06/398,404
Air flow control apparatus
Inventors:
Thomas Allan, Cecil W. Bowers, Joseph A. Wood
Patented Case
View Patent ↗
Granted: Jul 3, 1984
Filed: Jul 14, 1982
Inventors
Thomas Allan
Cecil W. Bowers
Joseph A. Wood
Assignee (at issue)
FLANDERS FILTERS, INC.
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.