Air curtains
United States Patent 3282193

Inventors:
Ernest, Jennings Gerald
Publication Date:
11/01/1966
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Assignee:
MINIKAY LTD
Primary Class:
International Classes:
F24F9/00
US Patent References:
3207056Apparatus for shielding door openings by means of air
3211078Air curtain
Foreign References:
DE971345C