Telemobiloscope

1904

Telemobiloscope

The book of science

Tom Sharp

Christian Hülsmeyer electromagnetism

Telemobiloscope

Radar

Signals

The telemobiloscope was a precursor to the first radar systems, which required further technical advances and were developed in secret by several nations before and during the Second World War.

See also in The book of science:

Readings on wikipedia: