Blank for expansible envelope

Details Blank for expansible envelope Blank for expansible envelope

1985-07-30

1988-05-03

Herrmann, Winifred E.

Office supplies; artists and teachers materials

Paper or pasteboard for writing or printing

Envelope

229 68R

Patent

active

D02955369

REFERENCES:
patent: D250590 (1978-12-01), Cohn et al.
patent: 960384 (1910-06-01), Norman
patent: 1292264 (1919-01-01), Coulson, Jr. et al.
patent: 1956325 (1934-04-01), Hart
patent: 2219526 (1940-10-01), McLaren
patent: 2945617 (1960-07-01), Normandin
patent: 3073508 (1963-01-01), Hiersteiner
patent: 3552640 (1971-01-01), Young

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