File:Twistgrip Patent US765138.png

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Description Twistgrip - Patent Drawing
Date
Source https://www.google.co.in/patents/US765138
Author Carl O. Hedstrom
Permission
(Reusing this file)
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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inception

4 August 1903Gregorian

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current18:16, 17 February 2015Thumbnail for version as of 18:16, 17 February 20151,660 × 2,476 (131 KB)commons>MichaelFreyCrop

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