Photo of U.S. Patent 2,988,237 certificate taken at home of George C. Devol in June 2006 by grandson William Wardlow. The patent for "Programmed Article Transfer" was issued by the United States Patent and Trademark Office on June 13, 1961.
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The text and illustrations of US patents published before March 1, 1989 are in the public domain unless the patent text contains a specific notice that portions are copyrighted. See 37 CFR 1.71(d), 37 CFR 1.84(s)
The original patent contains no such notice, so its contents are in the public domain.
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