Counting and alphabet teaching device

Details Counting and alphabet teaching device Counting and alphabet teaching device

1995-04-10

1996-06-04

Word, A. Hugo

Office supplies; artists and teachers materials

Teaching material

Sensory feedback, e.g., audio-visual teaching machine

D14100

Patent

active

D03704980

REFERENCES:
patent: D292404 (1987-10-01), Wilson et al.
patent: D308855 (1990-06-01), Schaum
patent: D345146 (1994-03-01), Lozo
patent: 4636172 (1987-01-01), Fredericks
patent: 4950165 (1990-08-01), Machaalani
patent: 4988321 (1991-01-01), Goldfarb

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