Envelope with windows

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

Design Patent

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Design Patent

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D0471229

CLAIM:
The ornamental design for an envelope with windows, as shown and described.

REFERENCES:
patent: 30980 (1860-12-01), Murray
patent: 717418 (1902-12-01), Kost
patent: 876743 (1908-01-01), Souder
patent: 897778 (1908-09-01), Post
patent: 907313 (1908-12-01), Cambe
patent: 1041827 (1912-10-01), MacNaughton
patent: 1264451 (1918-04-01), Swift
patent: 1387717 (1921-08-01), Hogan

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