William Platten, 13, Green Bay Ward 6, Brown, Wisconsin (US Census 1910)

<Einar Michelson, ex-champion of the Western Chess association, played against twenty opponents on Jan. 17 at the Chicago Chess and Checker club. A larger attendance was expected, but the bad weather kept away many visitors and spectators. W. R. Doolittle, H. M. Howe, F. R. Mason, C. F. Perkins, and <W. J. Platten> won their games, while W. D. Angus and J. Shallcross drew. The losers were C. A. Brooks, A. F. Bryce, F. C. Craig, A. J. Ebner. L. W. Felt, P. Henneberry, D. Hutchinson, J. S. Junkin, S. M. Knudson, M. Levy, J. Mackenzie, C. Turner, and G. C. White. Totals: Michelson, 13, opponents, 5; drawn, 2.> (Chicago Tribune, 23 Jan. 1910, p. 4 III)

On the <Washington's birthday tournament of the Illinois State Chess association … Round 1 … <W. J. Platten> 0 H. G. Kent 1> (Chicago Tribune, 7 Feb. 1910, p. 4 III)

<Oscar Chajes, champion of the Western Chess association, met sixteen players in a simultaneous exhibition last Monday at the Chicago Chess and Checker club. Of these he defeated twelve and lost to four. The winners were: H. Abrahams, D. Hutchinson, E. Michelsen, and T. L. Reeve, while W. L. Cox, W. R. Doollttle, H. F. Doyle, A. J. Ebner, J. S. Junkin, G. H. Knover, M. Levy, <W. J. Platten>, F. Powell, J. Shallcross, and N. Spira lost their games.> (Chicago Tribune, 13 Feb 1910, p. 4 III)

William J. Platten, Green Bay. Steam Expert, Illinois Steel Co. (Univ. of Wisconsin, Chicago, school catalogue)

<Harry P. Lee entertained the members of the Kenwood Chess club last Saturday night with a simultaneous exhibition against twenty adversaries at 4656 Cottage Grove avenue. There was a good attendance, and many more games could have been played had there been more boards and men. The single player was defeated by H. G. Kent, E. Wicklund, P. J. Himmelberg, C. Backer, E. W. Wilson (12 years old), E. Schonsherg, and P. C. Carroll; drew with <W. J. Platten> and W. E. Sparrow, and won from L. W. Wilson, C. Cain, W. Beauchamp (the last two members of the Wendell Phillips High school team), J. S. Junkin, S. Rheinstein, John King, O. Lundehn, W. R. Doolittle, H. Harrold, and R. L. White.> (Chicago Tribune, 10 Dec 1911, p. 4 III)

"William J. Platten has resigned his position as steam expert with the Illinois Steel Co. of Chicago, to go into business with Platten Bros., Green Bay. His business will be that of farming and meat" (Wisconsin alumni magazine, vol, 13, no. 7, April 1912)

<W. J. Platten, of Green Bay, Wis.> (Brooklyn Daily Eagle, 18 Aug 1915, p. 2) (on the US Open in Excelsior, Minn.)

William J. Platten, Second Lieutenant, 19th Company, First Regiment, Fixed Defense Force, Mb Philadelphia (US Marine Corps Muster Rolls 1917)

<On Monday evening, December 17, the Central Y. M. C. A. Chess Club played a six-board match with the University of Pennsylvania. The score follows: … <W. J. Platten> 1 S. Gerson 0> (Philadelphia Inquirer, 30 Dec 1917, p. 6)

On Central YMCA vs Invisible Chess Club: <<W. J Platten> 1 W. J. Webb 0> (Philadelphia Inquirer, date unreadable, probably February, 1918)

William Platten, 33, single, farmer, N Oakland ave., Green Bay Ward 6, Wisconsin (US Census 1920)

William J. Platten, 218 N. Oakland, Green Bay (Univ. of Wisconsin student list 1921)

William Platten, 43, single, fruit grower, N Oakland, Green Bay, Wisconsin (US Census 1930)

William J. Platten, 53, b. in Wisconsin, single, farmer, 22 Indian River, Florida (US Census 1940)

William Joseph Platten, major, b. 20 Feb 87, retired from service 24 June 1944 (US Select Military Registers)