Educational toy clock

Details Educational toy clock Educational toy clock

1975-09-02

1977-08-23

Feifer, Melvin B.

Office supplies; artists and teachers materials

Teaching material

Demonstrator or exhibitor

D1907

Patent

active

D02455056

REFERENCES:
patent: 2172450 (1939-09-01), Pitcher
patent: D204776 (1966-05-01), Appel et al.
patent: D216983 (1970-03-01), O'Brien

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