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1 янв 1910 г. - AT&T buys audion patent

Описание:

The audion is sold in order to pay de Forest's legal bills. AT&T's R&D department discovers that the audion was almost completely wrong, but that de Forest did get the three electrode design right (in theory). This three-electrode design leads to the creation of vacuum tube

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ByKaroline Herkamp
23 апр 2021
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1 янв 1910 г.
Сейчас
~ 115 г назад
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