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Patent:USD231357


Patent:US D231357
Title:Educational Mathematical Toy
Date:16.04.1974
Place:
Country:USA
Person:M. R. Meyers and M. Langieri
Company:
Internal Links:Lehrmittel
Keywords:
Link to the patent office:
(without guarantee)
 USD231357 (espacenet),  USD231357 (uspto)


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