Elmer Lewis Greensfelder (February 7, 1892 in Baltimore, Maryland – December 19, 1966) was an American playwright and inventor. In 1911, he graduated from Johns Hopkins University, and later he used his degree to serve in World War I.Obituary of Elmer Greensfelder, Baltimore Sun, December 20, 1966
Plays In 1932, Elmer Greensfelder won a contest from the Drama League of America for his play Broomsticks-Amen!.Donald Kirkley, "Little Theaters Here Cheer By Award Of Drama League", Baltimore Sun, January 31, 1932. Greensfelder also wrote the play Half Past Heaven.Donald Kirkley, "Half Past Heaven Is Presented At Play-Arts Guild", Baltimore Sun, October 29, 1931. Some of his other plays include The Saints Draws a Daggar, The Crocodile Chuckles, Six Stokers Who Own the Bloomin' Earth, and Mark Twain.Holly, David. "Elmer Greensfelder", in Baltimore in American Literature. Johns Hopkins University, 1933.
Patents Greensfelder was an inventor with numerous approved patents, including one for "Method and Apparatus For Synchronously Producing Sounds To Accompany Motion Pictures". This patent was a system that would make sound automatically play while a motion picture was playing.United States Patent Office, Method and Apparatus For Synchronously Producing Sounds To Accompany Motion Pictures, Elmer Greensfelder, 1254684, 1918. (accessed October 25, 2009) Other patents include "Changeable Profile Toy"United States Patent Office, Changeable Profile Toys, Elmer Greensfelder, 2755577, 1956. (accessed October 17, 2009) and "Loose Leaf Binder".United States Patent Office, Loose Leaf Binder, Elmer Greensfelder, 1525777, 1925. (accessed October 25, 2009)
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