Catenary arch building toy

Details Catenary arch building toy Catenary arch building toy

1987-07-10

1989-11-07

Radmaker, Charles A.

Games, toys, and sports goods

Toy

Representation or scale model

D21108, D21114

Patent

active

D03044645

REFERENCES:
patent: 604708 (1898-05-01), Burton
patent: 1568252 (1926-01-01), Strub
patent: 1878373 (1932-09-01), Breeser

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