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The text and illustrations of US patents are in the public domain in the United States unless the patent text contains a specific notice that portions are copyrighted.[1][2][3]
The original patent contains no such notice, so its contents are in the public domain in the United States. PD-US Public domain in the United States //www.marefa.org/%D9%82%D8%A7%D9%84%D8%A8:PD-US-patent-no_notice |