Sales and advertising equipment – Signs or display forms – Card type
Patent
1980-02-04
1982-06-01
O'Keefe, Veronica
Sales and advertising equipment
Signs or display forms
Card type
D2002
Patent
active
D02647311
REFERENCES:
patent: 1376716 (1921-05-01), Marshel
patent: 3015899 (1962-01-01), Ensign et al.
patent: 3611604 (1971-10-01), Saltzman
patent: 4138787 (1979-02-01), Sarkisian
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