File:Hill's message protector.png
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Summary
| 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
|
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
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
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:34, 12 October 2021 | | 3,629 × 3,322 (1.97 MB) | wikimediacommons>Belbury | higher resolution version |
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