File:CipherTypewriter5.jpg

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Original file (604 × 838 pixels, file size: 58 KB, MIME type: image/jpeg)

Captions

Captions

Part of the Mechanism of the O'Brien Cipher Typewriter

Summary

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Description
English: See Apparatus for coding and decoding, US Patent 2046276, Applied for March 30th 1929
Date
Source Cipher Apparatus, US Patent 2270137, Applied for 11 May 1939
Author Unknown authorUnknown author

Licensing

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May or may not be in the public domain
 In general, the contents of United States patents are in the public domain.

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 (see 37 CFR 1.71(d) & (e) and 37 CFR 1.84(s), and MPEP § 608.01(e) & (w) and MPEP § 1512):

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.

The original patent should be checked for the presence of such language before an assumption is made that the contents are in the public domain. (This template can be replaced by {{PD-US-patent-no notice}} in such cases.)

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