Image:Hill's message protector fig4 cropped.png

From Wikipedia, the free encyclopedia

You have new messages (last change).
No higher resolution available.

Hill's_message_protector_fig4_cropped.png‎ (405 × 370 pixel, file size: 11 KB, MIME type: image/png)

A cropped, cleaned up version of figure 4 from Hill's "Message Protector" patent, US patent 1,845,947 of 1929. Sourced from http://www.und.nodak.edu/org/crypto/crypto/.hill4.html where it was scanned in by the American Cryptogram Association. Securiger 08:24, 22 Nov 2004 (UTC)

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

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.

File history

Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version.
Click on date to download the file or see the image uploaded on that date.


The following pages on the English Wikipedia link to this file (pages on other projects are not listed):

Retrieved from "http://en.wikipedia.org../../../h/i/l/Image%7EHill%27s_message_protector_fig4_cropped.png_fece.html"