Sales and advertising equipment – Signs or display forms – Card type
Patent
1990-06-04
1993-04-06
Burke, Wallace R.
Sales and advertising equipment
Signs or display forms
Card type
Patent
active
D03345971
REFERENCES:
patent: D231563 (1974-04-01), Coy
patent: D280745 (1985-09-01), Cobb
patent: 4821437 (1989-04-01), Abramson et al.
The Development and Evaluation of Effective Symbol Signs May 1982, p. 1.
Burke Wallace R.
Jackson Marcus
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