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Subject: Inventors--Illinois
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Sheridan Road News-Letter (1889), 25 Jan 1901, p. 1 ...Sheridan Road News-Letter (1889), 25 Jan 1901, p. 1 ...
Highland Park News (1874), 5 Nov 1897, p. 3 ...Highland Park News (1874), 5 Nov 1897, p. 3 ...
Highland Park Press (1912), 22 Feb 1917, p. 10 ...Highland Park Press (1912), 22 Feb 1917, p. 10 ...
Highland Park Press (1912), 31 May 1917, p. 1 ...Highland Park Press (1912), 31 May 1917, p. 1 ...
Jacoby, John, The Wilmette Beacon (Northbrook, Illinois), 5 Mar 2020, 22, 25 Describes Wilmette resident Edwin Dempsey's invention of a coding system that revolutionized the transport of U.S. military on the railroads during World War I.Jacoby, John, The Wilmette Beacon (Northbrook, Illinois), 5 Mar 2020, 22, 25 Describes Wilmette resident Edwin Dempsey's invention of a coding system that revolutionized …
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