File:USPatent701839-CallahanAmericus-WindowedEnvelope.gif

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	06:38, 6 May 2007		545 × 405 (23 KB)	Thisisbossi	{{Information\| \|Description= Technical drawing of a windowed envelope, United States Patent 701839, by Americus F. Callahan \|Source= United States Patent and Trademark Office \|Date= 1902-06-10 \|Author= Americus F. Callahan }}

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