Image:US390721.png

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Electric system U.S. Patent 390721

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 In general, the contents of United States patents are in the public domain.

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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.

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This image is in the public domain in the United States. In most cases, this means that it was first published in the United States prior to January 1, 1923 (see the PD-US talk page for more cases). Its copyright has also expired in those countries with a copyright term of life of the author plus 50 years.

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  • (del) (cur) 04:02, 18 October 2003 . . Reddi ( Talk | contribs) . . 516×806 (51,757 bytes) (Electric system US390721 [Large Image])

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