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

British man first to patent radar ( Sept. 17, 1935 )
from http://www.patent.gov.uk/ 2001

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).

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BREVET D'INVENTION (20 JUILLET 1934)

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