Yo-yo

Games – toys – and sports goods – Toy – Spinning or whirling

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2101

Patent

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D04123492

REFERENCES:
patent: D156582 (1949-12-01), Tomarin
patent: D167723 (1952-09-01), Scott
patent: D247386 (1978-02-01), Hellman
patent: 3036835 (1962-05-01), Gartner
patent: 3175326 (1965-03-01), Isaacson
patent: 3256635 (1966-06-01), Radovan
patent: 4130962 (1978-12-01), Ennis
patent: 4207701 (1980-06-01), Kuhn
patent: 4332102 (1982-06-01), Caffrey
patent: 4895547 (1990-01-01), Amaral

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