Image:Seriescellelectrolyzerdesign.png

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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.

Description	The image was retrieved from United States patent #4,014,777 This image is a screenshot of Figure #2 from US Patent #4,014,777. It depicts a series cell electrolyzer design, with only the outer two plates connected to a power source. Also visible is the single gas output signifying the common ducted design.
Source	Brown, Yull (March, 1977). United States patent #4,014,777
Date	January 4'th, 2008
Author	Yull Brown
Permission (Reusing this image)	The image is of the original Yull Brown common ducted electrolyzer design. It is a unique image with non existent alternatives, and is necessary to provide substantive information in the relevant article.

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	Date/Time	Dimensions	User	Comment
current	01:08, 6 January 2008	1,040×686 (285 KB)	Omegatron (Talk \| contribs)	(higher resolution)
	04:19, 5 January 2008	433×324 (37 KB)	Nseidm1 (Talk \| contribs)	({{Information \|Description=This image is a screenshot of Figure #2 from US Patent #4,014,777. It depicts a series cell electrolyzer design, with only the outer two plates connected to a power source. Also visible is the single gas output signifying the co)