Granted Patent
Utility
US 4,535,811 · App. 06/572,696
Air flow control apparatus
Inventors:
Joseph A. Wood, William Peebles
Patented Case
View Patent ↗
Granted: Aug 20, 1985
Filed: Jan 20, 1984
Inventors
Joseph A. Wood
William Peebles
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.