Children's spelling toy

Details Children's spelling toy Children's spelling toy

1991-12-09

1993-12-21

Burke, Wallace R.

Office supplies; artists and teachers materials

Teaching material

Demonstrator or exhibitor

Patent

active

D03425479

REFERENCES:
patent: 305585 (1884-09-01), Forrest
patent: 472419 (1892-04-01), Wind
patent: 1833793 (1931-11-01), Pfleger
patent: 2496498 (1950-02-01), Shields
patent: 3674905 (1972-07-01), Collins
patent: 4026043 (1977-05-01), Caruso
patent: 4146978 (1979-03-01), Breslow
patent: 4340373 (1982-07-01), D'Andrade et al.
patent: 4643680 (1987-02-01), Hill
patent: 4902230 (1990-02-01), Jones

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