File:Hill's message protector.png

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Original file ‎(3,629 × 3,322 pixels, file size: 1.97 MB, MIME type: image/png)

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Description
Русский: Шифровальная машина Хилла
English: Hill's cipher machine
Date
Source Figure 4 from Hill's "Message Protector" patent, US patent 1,845,947 of 1929. Sourced from https://patents.google.com/patent/US1845947A/en
Author patents.google.com

Licensing[edit]

Public domain The text and illustrations of US patents published before March 1, 1989 are in the public domain unless the patent text contains a specific notice that portions are copyrighted. See 37 CFR 1.71(d), 37 CFR 1.84(s)

The original patent contains no such notice, so its contents are in the public domain. Note: This only applies to images published before March 1, 1989. Patents published after that date are most likely copyrighted, unless in the public domain for another reason, such as {{PD-ineligible}}.

Original upload log[edit]

The original description page was here. All following user names refer to en.wikipedia.
  • 2004-11-22 08:01 Securiger 405×370× (11156 bytes) A cropped, cleaned up version of figure 4 from Hill's "Message Protector" patent, US patent 1845947 of 1929

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Date/TimeThumbnailDimensionsUserComment
current09:04, 12 October 2021Thumbnail for version as of 09:04, 12 October 20213,629 × 3,322 (1.97 MB)Belbury (talk | contribs)higher resolution version
19:19, 25 October 2015Thumbnail for version as of 19:19, 25 October 2015405 × 370 (11 KB)Art3001 (talk | contribs)User created page with UploadWizard

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