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Image from U.S. Patent 774,250, the first electrical power plug

SEPARABLE ATTACHMENT-PLUG
Inventor: HARVEY HUBBELL
Patent number: 774250
Filing date: Feb 26, 1903
Issue date: Nov 8, 1904
Public domain
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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.

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

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 (see 37 CFR 1.71(d) & (e) and 37 CFR 1.84(s), and MPEP § 608.01(e) & (w) and MPEP § 1512):

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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Date/TimeThumbnailDimensionsUserComment
current23:00, 23 May 2005Thumbnail for version as of 23:00, 23 May 20051,660 × 1,018 (66 KB)DukImage from US Patent #774,250, the first electrical power plug {{patent}}

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