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Thomas Alva Edison (February 11, 1847 – October 18, 1931) was an American inventor and businessman who developed many devices which greatly influenced life worldwide into the 21st century. Dubbed "The Wizard of Menlo Park" by a newspaper reporter, he was one of the first inventors to apply the principles of mass production to the process of invention, and can therefore be credited with the creation of the first industrial research laboratory. Some of the inventions attributed to him were not completely original but amounted to improvements of earlier inventions or were actually created by numerous employees working under his direction. Nevertheless, Edison is considered one of the most prolific inventors in history, holding 1,097 U.S. patents in his name, as well as many patents in the United Kingdom, France, and Germany. He lived to the age of 84.
Contents[hide]
1 Early life
2 Marriages and children
3 Beginning his career
4 Menlo Park
4.1 Incandescent era
4.2 Carbon telephone transmitter
4.3 War of currents
4.4 Work relations
4.5 Media inventions
5 Later years
6 Criticism
7 Tributes
7.1 Companies bearing Edison's name
8 Trivia
9 See also
10 Biographies
11 References
12 External links
Early life and rest of the article please see:
http://en.wikipedia.org/wiki/Edison
Helen Adams Keller (June 27, 1880 – June 1, 1968) was a deafblind American author, activist and lecturer.
Helen Adams Keller
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http://upload.wikimedia.org/wikipedia/commons/thumb/b/bb/Helen_Keller.jpg/141px-Helen_Keller.jpg
Deafblind American author, activist, and lecturer
Born
June 27, 1880
Tuscumbia, Alabama
Died
June 1, 1968
Easton, Connecticut
Contents[hide]
1 Biography
1.1 Childhood
1.2 Education
1.3 Political activities
1.4 Introduction of the Akita dog to America
1.5 Writings
1.6 Honors and later life
2 Portrayals of Helen Keller
3 External links
3.1 IMDB
4 References
Biography and rest of the article please see:
http://en.wikipedia.org/wiki/Helen_Keller