Image:PhotoelectricEffect(Tesla).png

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photoelectric_effect - Tesla patent - small PNG

See also: Image:PhotoelectricEffect(Tesla-small).PNG

may or may not be in the public domain
 In general, the contents of United States patents are in the public domain.[1]

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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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