Stampless envelope

Details Stampless envelope Stampless envelope

1996-08-05

1997-09-23

Lucas, Susan J.

Office supplies; artists and teachers materials

Paper or pasteboard for writing or printing

Envelope

1901

Patent

active

D03840980

REFERENCES:
patent: 2794590 (1957-06-01), Sills, Jr.
patent: 3221980 (1965-12-01), Mercur
patent: 3380648 (1968-04-01), Lyman
patent: 4245775 (1981-01-01), Conn
patent: 4597591 (1986-07-01), Gendron et al.
patent: 4938414 (1990-07-01), Lippert

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