Changeable copy message board

Details Changeable copy message board Changeable copy message board

1977-11-18

1979-04-24

Burke, Wallace R.

Sales and advertising equipment

Signs or display forms

Combined with diverse article or function

D2003

Patent

active

D02516950

REFERENCES:
patent: D154652 (1949-08-01), Baumgarten
patent: 1584218 (1926-05-01), Davis
patent: 3798814 (1974-03-01), Harmon
patent: 3958349 (1976-05-01), Nidelkoff
patent: 4035940 (1977-07-01), Mickey et al.

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