Educational board game

Office supplies; artists and teachers materials – Teaching material – Demonstrator or exhibitor

Patent

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D21 20

Patent

active

D03520668

REFERENCES:
patent: D219885 (1971-02-01), Amundson
patent: D344097 (1994-02-01), Green
patent: 2703459 (1955-03-01), Paquette
patent: 2794642 (1957-06-01), O'Neill
patent: 2889634 (1959-06-01), Bringmann
patent: 4363628 (1982-12-01), Kirkpatrick
patent: 4431195 (1984-02-01), Brand
patent: 4799686 (1989-01-01), Martinex

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