Building block
United States Patent 2493435
US Patent References:
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- - 1216840


Inventors:
Arehambault, Alcide J.
Publication Date:
01/03/1950
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Assignee:
Arehambault, Alcide J.
Primary Class:
446/122
Other Classes:
446/124
International Classes:
A63H33/08; A63H33/04
Foreign References:
FR489079A
FR794583A