Air duct plaster register frame
United States Patent 2679796
US Patent References:
Wall-register construction
- - 1567089

Air duct register
- - 1959132

Register
- - 2104208


Inventors:
Vernon, Froelich Max
Earl, Draper Herbert
Publication Date:
06/01/1954
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Assignee:
Vernon, Froelich Max
Earl, Draper Herbert
Primary Class:
454/331
Other Classes:
52/213
International Classes:
E04F13/06; E04F13/02