Marble raceway

Details Marble raceway Marble raceway

1988-04-18

1990-05-08

Rademaker, Charles A.

Games, toys, and sports goods

Toy

Representation or scale model

D21 8, D21 59

Patent

active

D03077802

REFERENCES:
patent: D256811 (1980-09-01), Crawford
patent: 347682 (1886-08-01), Buckingham
patent: 408635 (1889-08-01), Sommer
patent: 1252158 (1918-01-01), Okel
patent: 3028704 (1962-04-01), Rumbaugh
patent: 4175665 (1979-11-01), Dogliotti

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