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USPatent701839-CallahanAmericus-WindowedEnvelope.gif(545 × 405 pixels, file size: 23 KB, MIME type: image/gif)



Technical drawing of a windowed envelope, United States Patent 701839, by Americus F. Callahan

Source United States Patent and Trademark Office
Author Americus F. Callahan
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May or may not be in the public domain In general, the contents of United States patents published before March 1, 1989 are in the public domain.[1]

In specific cases, patent applicants and holders may claim copyright in portions of those documents. In those specific cases, applicants are required to identify the portions that are protected under copyright, and are additionally required to state the following within the body of the application and patent:[2] [3]

A portion of the disclosure of this patent document contains material which is subject to (copyright or mask work) protection. The (copyright or mask work) owner has no objection to the facsimile reproduction by any­one of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all (copyright or mask work) rights whatsoever.

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current06:38, 6 May 2007Thumbnail for version as of 06:38, 6 May 2007545 × 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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