U.S. patent number D471,932 [Application Number D/134,161] was granted by the patent office on 2003-03-18 for tennis ball doll learning aid. Invention is credited to Nicolas F. Ravelo.
United States Patent | D471,932 |
Ravelo | March 18, 2003 |
Inventors: | Ravelo; Nicolas F. (Fort Worth, TX) |
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Appl. No.: | D/134,161 |
Filed: | December 13, 2000 |
Current U.S. Class: | D19/59; D21/659 |
Current International Class: | 1907 |
Field of Search: | ;D19/59,62 ;D21/623,627,630,659,799 ;434/247 ;446/72,183 |
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D219784 | January 1971 | Sallak |
4024657 | May 1977 | Dutcher |
D271405 | November 1983 | Helein |
D304478 | November 1989 | Fiust |
D307781 | May 1990 | Fiust |
D325762 | April 1992 | Hoglund |
D418123 | December 1999 | Koerner |
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