Math teaching board for special education students

Details Math teaching board for special education students Math teaching board for special education students

1991-03-22

1994-02-08

Burke, Wallace R.

Office supplies; artists and teachers materials

Teaching material

Demonstrator or exhibitor

Patent

active

D03440974

REFERENCES:
patent: D163085 (1951-05-01), Bishop
patent: D170563 (1953-10-01), Zipkin
patent: 2472439 (1949-06-01), Rogers
patent: 2892267 (1959-06-01), Harvey

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