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11 Sept 1878 Jahr - Thomas Edison and the “first” light bulb. In 1878, Thomas Edison began serious research into developing a practical incandescent lamp and on October 14, 1878, Edison filed his first patent application for "Improvement In Electric Lights".

Zugefügt zum Band der Zeit:

1 Sep 2017

Datum:

11 Sept 1878 Jahr
Jetzt
~ 145 years ago