Sales and advertising equipment – Signs or display forms
Patent
1981-02-23
1983-08-30
Kemper, Catherine E.
Sales and advertising equipment
Signs or display forms
D 3 72, D 3 73, D2003
Patent
active
D02703580
REFERENCES:
patent: 1448659 (1923-03-01), Goodman et al.
patent: 3025954 (1962-03-01), Massey et al.
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