U.S. patent number D569,440 [Application Number D/292,592] was granted by the patent office on 2008-05-20 for learning display cube. Invention is credited to Maria Rotta.
United States Patent | D569,440 |
Rotta | May 20, 2008 |
Inventors: | Rotta; Maria (Brentwood, NY) |
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Appl. No.: | D/292,592 |
Filed: | October 18, 2007 |
Current U.S. Class: | D19/62 |
Current International Class: | 1907 |
Field of Search: | ;D19/59-60,62,64 ;D21/405,470,475 ;40/720,725 ;434/247,258 |
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