This primary source comes from the Records of the Patent and Trademark Office.
National Archives Identifier:
6104276Full Citation: Patent Drawing for W. T. Stall's Football Trousers; 5/10/1904; 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-w-t-stalls-football-trousers, May 4, 2024]