Door knob hanger for displaying messages

Sales and advertising equipment – Signs or display forms – Attachable to vertical surface or hanging type

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Patent

active

D03393828

REFERENCES:
patent: D18444 (1888-07-01), Kayser
patent: D329468 (1992-09-01), Hatt
patent: 1276735 (1918-08-01), Devney
patent: 1984559 (1934-12-01), Wilcox
patent: 4862617 (1989-09-01), Cooke, Jr. et al.

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