This primary source comes from the Records of the Patent and Trademark Office, 1836 - 1978.
National Archives Identifier:
6920296Full Citation: Patent Drawing for G. F. Grant's Golf Tee; 12/12/1899; Records of the Patent and Trademark Office, 1836 - 1978, Record Group 241. [Online Version, https://docsteach.org/documents/document/patent-drawing-for-g-f-grants-golf-tee, May 4, 2024]