Sales and advertising equipment – Signs or display forms – Billboard type
Patent
1984-02-15
1986-09-02
Kemper, Catherine E.
Sales and advertising equipment
Signs or display forms
Billboard type
D20 41
Patent
active
D02854562
REFERENCES:
patent: D114742 (1939-05-01), Bair
patent: D180756 (1957-08-01), Winger
patent: 3176418 (1965-04-01), Ramseur, Jr.
patent: 4007552 (1977-02-01), Brooks
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