Blank for changeable alpha numeric characters

Details Blank for changeable alpha numeric characters Blank for changeable alpha numeric characters

1993-01-15

1995-01-10

Burke, Wallace R.

Sales and advertising equipment

Signs or display forms

Composite character

Patent

active

D03543137

REFERENCES:
patent: 2342847 (1944-02-01), Crosby
patent: 2510331 (1950-06-01), Crosby
patent: 2878814 (1959-03-01), Baldanza
patent: 3238654 (1966-03-01), Rosenak et al.
patent: 3407525 (1968-10-01), Connell
patent: 3574964 (1971-04-01), Ownbey
patent: 5090146 (1992-02-01), Sandefur
patent: 5257472 (1993-11-01), Harnois et al.

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