Public Timelines

For companies For educational institutions For teachers For students Dashboard

For educational institutions For teachers For students Dashboard

Create a timeline

Public timelines

About & Feedback Terms Privacy FAQ

Dashboard Get premium

Donate

jan 14, 1912 - radio signal amplifier devised is created by students in Columbia university electrical engineering.

Added to timeline:

film, broadcast,video ,etc

28 Sep 2017

0

0

716

Date:

jan 14, 1912

Now

~ 114 years ago

About & Feedback Terms Privacy FAQ

Dashboard Get premium

Donate

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

Secured with SSL