Ventilators
United States Patent 3112687
US Patent References:
/1319526.html
- - 1319526

Ventilator
- - 2157609

Ventilating skylight
- - 2711126

Ventilator for non-porous structures
- - 2939375

Ventilators
- - 3062125


Inventors:
Leo, Henneberger
Publication Date:
12/03/1963
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Assignee:
Leo, Henneberger
Primary Class:
454/82
Other Classes:
454/147, 454/275
International Classes:
B63J2/10; B63J2/00