This primary source comes from the Records of the Patent and Trademark Office.
National Archives Identifier:
6920299Full Citation: Patent Drawing for A. F. Knight's Golf Club; 3/24/1903; Utility Patent Drawings, 1837 - 1911; Records of the Patent and Trademark Office, Record Group 241; National Archives at College Park, College Park, MD. [Online Version, https://www.docsteach.org/documents/document/patent-drawing-for-a-f-knights-golf-club, January 18, 2025]