Combined advertising display and door lock demonstrator

Details Combined advertising display and door lock demonstrator Combined advertising display and door lock demonstrator

1993-11-05

1995-03-28

Burke, Wallace R.

Office supplies; artists and teachers materials

Teaching material

Demonstrator or exhibitor

D20 10, D10106

Patent

active

D03568270

REFERENCES:
patent: D283495 (1986-04-01), Wavre
patent: D314791 (1991-02-01), Hwang
patent: D327797 (1992-07-01), Martin
patent: 3864848 (1975-02-01), Smith

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