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Oliver Evans
was the third person to be granted a patent in
the United States, for flour-milling inventions,
in 1790. He subsequently invented an improved
steam engine and a steam-powered dredger. |
William Murdock
began his career making improvements to the Watt
steam engine, and then developed the world's
first steam carriage. The invention for which he
is best known, however, is the use of coal gas
for lighting purposes. |
Alexander Parkes
patented the first man-made plastic in 1855. By
the time of his death he held over 80 patents for
processes and products related to electroplating,
rubber, and plastics. |
George
Westinghouse first gained fame for
the railroad air brake, which he patented in
1869. In 1886 he founded the Westinghouse
Electric Company in order to commercialize
alternating current as the standard for
electrical transmission. |
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