Electronic educational game for teaching children colors, number

Details Electronic educational game for teaching children colors, number Electronic educational game for teaching children colors, number

1989-05-03

1991-08-06

Burke, Wallace R.

Office supplies; artists and teachers materials

Teaching material

D21129

Patent

active

D03188809

REFERENCES:
patent: D203758 (1966-02-01), Spengler
patent: D217374 (1970-04-01), Hubiak
patent: D236523 (1975-08-01), Reiling
patent: 462556 (1891-11-01), Huber
patent: 2360030 (1944-10-01), Hickling

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