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Most of these inventions were not completely original but improvements of earlier inventions. However, one of Edison's major innovations was the first industrial research and development lab, which was built in Menlo Park and West Orange. Throughout the 20th century, Edison was the world's most prolific inventor. At the beginning of the century ...
Edison recognized the possible demand for a high-speed copying device after observing the incredible amount of document duplication required of merchants, lawyers, insurance companies, and those of similar occupations. [1] To satisfy this demand, Edison invented the electric pen, which uses a perforating function inspired by the printing telegraph.
Edison with the second model of his phonograph in Mathew Brady's studio in Washington, D.C. in April 1878. Edison began his career as an inventor in Newark, New Jersey, with the automatic repeater and his other improved telegraphic devices, but the invention that first gained him wider notice was the phonograph in 1877. [40]
Edison would take full credit for the invention, but the historiographical consensus is that the title of creator can hardly go to one man: While Edison seems to have conceived the idea and initiated the experiments, Dickson apparently performed the bulk of the experimentation, leading most modern scholars to assign Dickson with the major ...
Edison, an Ohio native who moved to West Orange, NJ, in 1886 and whose legendary lab and residence are preserved at the historical park — created the doll in 1890 after he invented the phonograph.
Thomas A. Edison invented the phonograph, the first device for recording and playing back sound, in 1877.After patenting the invention and benefiting from the publicity and acclaim it received, Edison and his laboratory turned their attention to the commercial development of electric lighting, playing no further role in the development of the phonograph for nearly a decade.
Collecter, Ward Harris, holds a talking doll with a metal torso that was invented by Thomas Edison, in San Francisco, Calif., Feb. 9, 1949. Harris holds in his other hand the inside mechanicals of ...
Getty By Jacquelyn Smith The job interview was born in 1921, when Thomas Edison created a written test to evaluate job candidates' knowledge. Since then, the process has come a long way. "As the ...