L'histoire du "radar ", les faits
The history of the "radar", the facts

BREVET D'INVENTION (20 JUILLET 1934)

" Nouveau système de repérage d'obstacles et ses applications "

British man first to patent radar ( Sept. 17, 1935 )
from http://www.patent.gov.uk/

66 years since radar was patented by British inventor.

Initially used for military intelligence purposes radar is now more widely used.
A British man from North Dundee invented radar and patented it with the UK Patent Office 66 years ago on 17 September 1935. …….
Patents can be viewed from this web site via the free esp@cenet database (Watson-Watt’s radar patent GB593017).

"On the early morning of Tuesday 26 February 1935 the radio station at Daventry (Borough Hill) was used for the first-ever practical demonstration of radar, by its inventor Robert Watson-Watt and Arnold Frederic Wilkins, who used a radio receiver installed in a trailer at Stowe Nine Churches (just off the A5 about three miles (5 km) south of Weedon Bec and in the Daventry district) to receive signals bounced off a metal-clad Handley Page Heyford bomber flying across the radio transmissions. The interference picked up from the aircraft allowed its approximate navigational position to be estimated."

wikipedia daventry