Mechanical puzzle

Games – toys – and sports goods – Toy – Representation or scale model

Patent

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D21 59

Patent

active

D03660729

REFERENCES:
patent: D192011 (1962-01-01), Nowlin
patent: D229078 (1973-11-01), Aster
patent: D256037 (1980-07-01), Csoka
patent: 1170109 (1916-01-01), Rogers
patent: 3092389 (1963-06-01), Smith

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