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In 1867 Christopher Sholes, Carlos Glidden, and Samuel Lewis invented another typewriter. The Sholes and Glidden typewriter was the first device that allowed an operator to type substantially faster than a person could write by hand. The patent (U.S. 79,265) was sold for $12,000 to Densmore and Yost, who made an agreement with E. Remington and Sons (then famous as a manufacturer of sewing machines), to commercialize what was known as the Sholes and Glidden Type-Writer. Remington started production of their first typewriter on March 1, 1873 in Ilion, New York. The Type-Writer introduced the QWERTY, designed by Sholes, and the success of the follow-up Remington No. 2 of 1878-the first typewriter to include both upper and lower case letters via a shift key-led to the popularity of the QWERTY layout.