File:Johnson 1954 ice boring device patent.png

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Description
English: 1954 patent drawing of ice auger designed by Melvin C. Johnson
Date
Source US Patent 2,666,623
Author Melvin Johnson

Licensing

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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}}.

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current02:41, 20 November 2017Thumbnail for version as of 02:41, 20 November 2017401 × 871 (105 KB)Mike Christie (talk | contribs)User created page with UploadWizard

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