This primary source comes from the Records of the Patent and Trademark Office, 1836 - 1980.
National Archives Identifier:
7451781Full Citation: Patent Drawing for A. J. Lumsden's Cow Tail Holder; 6/7/1881; Utility Patent Drawings, 1837 - 1911; Records of the Patent and Trademark Office, 1836 - 1980, Record Group 241; National Archives at College Park, College Park, MD. [Online Version, https://www.docsteach.org/documents/document/patent-lumsdens-cow-tail-holder, April 18, 2024]