In 1837, British inventors William Cooke and Charles Wheatstone received a patent for their electromagnetic telegraph.
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In 1849, the forerunner of modern gas masks is patented by Lewis Phectic Haslett of Louisville, Ky. His "inhaler or lung protector" design used woolen fabric (or other porous material) to filter dust and other material from the air (U.S. No. 6,529).
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In 1860, a "Railroad air brake" was patented by Nehemiah Hodge (U.S. No. 28,670).
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