Title:
Educational device
United States Patent 1837194
Inventors:
Baumgarten, Samuel L.
Publication Date:
12/22/1931
Export Citation:
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Assignee:
Baumgarten, Samuel L.
Primary Class:
273/142JA
Other Classes:
273/272, 434/167, D21/374
International Classes:
A63F5/04; A63F5/04
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