Formation of thermal air currents
United States Patent 2268320

Inventors:
Brandt, Robert L.
Publication Date:
12/30/1941
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Assignee:
Brandt, Robert L.
Primary Class:
244/114R
Other Classes:
239/2.100, 165/45, 126/569, 239/14.100
International Classes:
B64F1/04; B64F1/00