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United States Patent 3174753

Inventors:
Miller, Wendell S.
Publication Date:
03/23/1965
Export Citation:
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Assignee:
Miller, Wendell S.
Primary Class:
273/157R
Other Classes:
273/282.100, 434/172, 273/288
International Classes:
A63F3/04
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US Patent References:
1432062Arithmetical puzzle blocks
0941680N/A
0176144N/A