J. G. Washington, of the United States Treasury Department, writes to James Curtis Booth (1810-1888) with the news that the Attorney General feels that there is no infringement upon Evan's patent.
Washington, J. G. “Letter from J. G. Washington to James Curtis Booth, May 3, 1855,” May 3, 1855. Papers of James Curtis Booth, Box 2, Folder 3. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/bxu5jcj.
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