Envelope book

Office supplies; artists and teachers materials – Paper or pasteboard for writing or printing – Envelope

Patent

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1901

Patent

active

D04306058

REFERENCES:
patent: D339604 (1993-09-01), Gerber-Phinny
patent: 2803338 (1957-08-01), Elliot
patent: 3826422 (1974-07-01), Dickinson
patent: 4717176 (1988-01-01), Matthews
patent: 5725252 (1998-03-01), Crum et al.

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