Today in Tech History x – April 20, 2018

1926 – Sam Warner approved the sound-on-disc system created by Western Electric and created the Vitaphone company to develop the process to add sound to film.

https://www.history.com/this-day-in-history/new-sound-process-for-films-announced

1940 – Vladimir Zworykin and his team from RCA demonstrated the first electron microscope. It measured 10 feet high and weighed half a ton, achieving a magnification of 100,000x.

https://webfiles.uci.edu/mcbrown/display/john_coleman.html

1964 – The first AT&T picturephone transcontinental call was made between test displays at Disneyland and the New York World’s Fair.

http://www.beatriceco.com/bti/porticus/bell/pdf/picturephone.pdf

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