Public Timelines

For educational institutions For teachers For students Cabinet

For educational institutions For teachers For students Open cabinet

Create a timeline

Public timelines

About & Feedback Соглашение Приватность FAQ

Cabinet Get premium

Donate

24 июн 1920 г. - Rogers batteryless

Описание:

Inverted line- operated vacuum tube receiver in 1925 by Edward s. rogers jr.

Добавлено на ленту времени:

1920’s timeline

6 ноя 2018

0

0

397

Дата:

24 июн 1920 г.

Сейчас

~ 105 г назад

About & Feedback Соглашение Приватность FAQ

Cabinet Get premium

Donate

The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.

Secured with SSL