Catenary arch barrel building toy

Details Catenary arch barrel building toy Catenary arch barrel building toy

1988-03-18

1989-11-07

Rademaker, Charles A.

Games, toys, and sports goods

Toy

Representation or scale model

D21108, D21114

Patent

active

D03044653

REFERENCES:
patent: D206012 (1966-10-01), Kristiansen
patent: 604708 (1898-05-01), Burton
patent: 1568252 (1926-01-01), Strub
patent: 1878373 (1932-09-01), Breeser
patent: 3604145 (1971-09-01), Zimmerman

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