France Telecom-Etablissement autonome de droit public(Centre National d'Etudes des Telecommunications)

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G02B OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS 2203
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 2445
 
  
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 2360
 
  
 
H03K PULSE TECHNIQUE 2129
 
  
 
H04K SECRET COMMUNICATION; JAMMING OF COMMUNICATION256
 
  
 
C07D HETEROCYCLIC COMPOUNDS 1161
 
  
 
F21V FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR 1109
 
  
 
G01N INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 1205
 
  
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 1158
 
  
 
G02F DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS 1132

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5397508 2-amino-5-nitropyridinium salts usable in non-linear optics and in electroptics and a process for preparing the sameNov 26, 91Mar 14, 95[F21V, C07D]
5394258 Active matrix display screen with storage capacitors formed of conductive blocks, semiconductive material, nonconductive material, and capacitive linesJun 22, 94Feb 28, 95[G02F]
5359323 Device for remote dialog between a station and one or more portable objectsAug 20, 91Oct 25, 94[H04Q]
5289332 Protective circuit for a control circuit, in particular of liquid crystal display screenSep 23, 91Feb 22, 94[H03K]
5262720 Circuit for controlling the lines of a display screen and including test means with a single outputOct 08, 91Nov 16, 93[G01R]
5252956 Sample and hold circuit for a liquid crystal display screenSep 23, 91Oct 12, 93[H03K, G09G]
5247578 Process for exchange of rights between microprocessor cardsJan 22, 92Sep 21, 93[G06F, H04K]
5238861 Method for manufacturing an active matrix display screen with storage capacitorsMay 14, 91Aug 24, 93[H01L]
5233631 Device for recovering a carrier wave provided with a circuit for inhibiting dummy frequency acquisitionsJun 06, 91Aug 03, 93[H03D]
5233656 Telephone installation for the remote loading of telephone rental data of an independent stationMay 28, 91Aug 03, 93[H04K]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5251017 Gamma correction circuit for an analog video signalExpiredJun 26, 91Oct 05, 93[H04N]
5243608 Optical transmission process by wavelength shifting and corresponding systemExpiredOct 24, 91Sep 07, 93[H01S]
5228094 Process of identifying and authenticating data characterizing an individualExpiredDec 30, 91Jul 13, 93[G06K]
5221636 Process and apparatus for the deposition of anti-reflection coatings and the checking of their thicknessExpiredJul 12, 91Jun 22, 93[H01L]
5221662 Superconducting screen printing ink and process for producing a thick superconducting film using this inkExpiredSep 11, 91Jun 22, 93[H01L, H01B]
5212113 Process for the selective epitaxy and etching of a III-V material in the same OMCVD growth frameExpiredSep 16, 91May 18, 93[H01L]
5190883 Method for making an integrated light guide detector structure made of a semiconductive materialExpiredMay 16, 91Mar 02, 93[H01L]
5189542 System for the optical switching of frequency multiplexed signalsExpiredJul 15, 91Feb 23, 93[H04J]
5187122 Process for fabricating an integrated circuit using local silicide interconnection linesExpiredFeb 26, 91Feb 16, 93[H01L]
5162754 Ultra-wideband dc-microwave amplifier device notably in integrated circuit formExpiredApr 29, 91Nov 10, 92[H03F]
5140381 Optical detection device with variable detection thresholdExpiredMar 20, 91Aug 18, 92[H01L]

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