This primary source comes from the Records of the Patent and Trademark Office.
National Archives Identifier:
6920297Full Citation: Patent Drawing for E. Kempshall's Golf Ball; 6/3/1902; 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-e-kempshalls-golf-ball, January 18, 2025]