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Edison demonstrated the device for the first time on November 29, 1878. The device recorded on a phonograph cylinder using up-down (vertical) motion of the stylus. Edison's patent specified that the audio recording was embossed. U.S. patent 0,200,993 – Acoustic Telegraphs; U.S. patent 0,200,994 – Automatic-Telegraph Perforator and Transmitter
Edison in 1861. Thomas Edison was born in 1847 in Milan, Ohio, but grew up in Port Huron, Michigan, after the family moved there in 1854. [8] He was the seventh and last child of Samuel Ogden Edison Jr. (1804–1896, born in Marshalltown, Nova Scotia) and Nancy Matthews Elliott (1810–1871, born in Chenango County, New York).
The 100 known most prolific inventors based on worldwide utility patents are shown in the following table. While in many cases this is the number of utility patents granted by the United States Patent and Trademark Office, it may include utility patents granted by other countries, as noted by the source references for an inventor.
Looking back, Thomas Edison couldn't be blamed for believing mass-produced concrete buildings were going to be big — after all, the original Yankee Stadium owes its construction to the Edison ...
Thomas Edison discovers thermionic emission. This effect forms the basis for the vacuum tube and the cathode ray tube. approximately 1893: The selenium phototube invention allows the conversion of brightness values into electrical signals. The principle is applied in wirephoto and television technology for a short time.
A photo of the original purchase order from Thomas Edison to Corning for the glass encasement for Edison’s lightbulb in 1880. CEO Wendell Weeks keeps the purchase order framed in his office as a ...
Historian Thomas Hughes (1977) describes the features of Edison's method. In summary, they are: Hughes says, "In formulating problem-solving ideas, he was inventing; in developing inventions, his approach was akin to engineering; and in looking after financing and manufacturing and other post-invention and development activities, he was innovating."
1888: Thomas Edison and William Kennedy Dickson invent the Kinetoscope. [441] 1888: Heinrich Hertz publishes a conclusive proof of James Clerk Maxwell's electromagnetic theory in experiments that also demonstrate the existence of radio waves. The effects of electromagnetic waves had been observed by many people before this but no usable theory ...
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