This primary source comes from the Records of the Patent and Trademark Office.
National Archives Identifier:
6277795Full Citation: Patent Drawing for T. G. Coleman's Unicycle Road and Racing Sulky; 10/19/1897; Utility Patent Number 592,130 Sht. 1; 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/sulky-patent, May 14, 2024]