Teaching tool

Details Teaching tool Teaching tool

1986-05-30

1989-08-01

Dunkins, Bruce W.

Office supplies; artists and teachers materials

Teaching material

Patent

active

D03025667

REFERENCES:
patent: D168834 (1953-02-01), Farinacci
patent: D295291 (1988-04-01), Browning, Jr.
patent: 2663096 (1953-12-01), McCurdy
patent: 3171217 (1965-03-01), Birdsal

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