Video training device

Details Video training device Video training device

1990-01-05

1992-01-21

Burke, Wallace R.

Office supplies; artists and teachers materials

Teaching material

Demonstrator or exhibitor

Patent

active

D03233510

REFERENCES:
patent: D194292 (1962-12-01), Koons et al.
patent: D218760 (1970-09-01), Jelinek
patent: D251295 (1979-03-01), Wilson et al.
patent: D273594 (1984-04-01), Lovejoy

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