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 "

 

 


 

brevet radar france

 

 

brevet radar france

 

 

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).

 

 

daventry radar experiment

 

"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

 

 

Emile Girardeau Cependant la vérité est autre

Brevet francais / juillet 1934

Brevet anglais / septembre 1935

Maurice Ponte la realisation effective de matériels opérationnels Encyclopédie de la radio 1936:
Détecteur d'obstacles
  la Mission Tizard   septembre 1940

brevet déposé aux USA 1939