Design for educational and/or therapeutic game set or similar ar

Details Design for educational and/or therapeutic game set or similar ar Design for educational and/or therapeutic game set or similar ar

1976-11-24

1979-06-05

Feifer, Melvin B.

Office supplies; artists and teachers materials

Teaching material

D 6216, D 6258, D 6264, D25 89, D92 1R, D21104, D1907

Patent

active

D02520290

REFERENCES:
patent: D66048 (1924-11-01), Stone
patent: D71675 (1926-12-01), Humphreys
patent: 3464145 (1969-09-01), Martin
Computers and People for Aug. 1976, p. 27, middle right, item.

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