ETAT FRANCAIS REPRESENTE PAR LE MINISTRE DES POSTES, TELECOMMUNICATIONS ET DE L'ESPACE (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
 
 
 
G06K RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS 1174
 
 
 
G10L SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION 182
 
 
 
H04K SECRET COMMUNICATION; JAMMING OF COMMUNICATION155

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5,524,172 Processing device for speech synthesis by addition of overlapping wave formsApr 04, 94Jun 04, 96[G10L]
5,218,637 Method of transferring a secret, by the exchange of two certificates between two microcomputers which establish reciprocal authorizationJun 11, 91Jun 08, 93[H04K]
5,184,001 System for remote information interchange between a portable object and a stationJul 11, 91Feb 02, 93[G06K]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5,254,293 Method for obtaining an organic polycrystalline materialExpiredOct 20, 92Oct 19, 93[B29D, B29C]
5,255,005 Dual layer resonant quadrifilar helix antennaExpiredNov 05, 90Oct 19, 93[H01Q]
5,243,260 Method to produce a display screen with a matrix of transistors provided with an optical maskExpiredSep 19, 91Sep 07, 93[G02K]
5,213,906 Composite material comprising a layer of a III-V compound and a layer of rare earth pnictide, production process and applicationExpiredApr 06, 90May 25, 93[B32B]
5,177,205 Method for obtaining a solid polycrystalline materialExpiredMar 08, 89Jan 05, 93[C07D, C07C]
5,170,427 Audio and video communications terminal with improved adjustmentsExpiredFeb 02, 90Dec 08, 92[H04N]
5,115,285 Method of producing a quasi-flat semiconductor device capable of a multi-wavelength laser effect and the corresponding deviceExpiredApr 25, 91May 19, 92[H01L]
5,089,870 SOI MOS transistor with a substrate-source connectionExpiredJun 07, 90Feb 18, 92[H01L]
5,083,013 System for remote information interchange between a portable object and a stationExpiredDec 18, 89Jan 21, 92[G06K]
5,081,004 Method to produce a display screen with a matrix of transistors provided with an optical maskExpiredNov 02, 89Jan 14, 92[H01L]
5,081,540 Holographic apparatus using incoherent lightExpiredApr 20, 90Jan 14, 92[G03H]
5,081,541 Incoherent light holographic method and apparatus for studying ground reliefExpiredApr 20, 90Jan 14, 92[G03H]
5,079,178 Process for etching a metal oxide coating and simultaneous deposition of a polymer film, application of this process to the production of a thin film transistorExpiredDec 08, 89Jan 07, 92[H01L]
5,074,955 Process for the anisotropic etching of a III-V material and application to the surface treatment for epitaxial growthExpiredAug 17, 90Dec 24, 91[H01L]
5,063,567 Photoreceptor for frequency-modulated optical signalsExpiredSep 14, 90Nov 05, 91[H01S]
5,055,739 Memory-equipped monochrome display of the photoconductor-electroluminescent typeExpiredFeb 08, 90Oct 08, 91[H01J]
5,046,074 Synchronization method and synchronization recovery devices for half-duplex communicationExpiredAug 16, 89Sep 03, 91[H04L]
5,043,236 Process for determining the focussing of a photolithographic apparatusExpiredDec 29, 89Aug 27, 91[G03C]
5,043,291 Method of manufacturing a broadband high emission power semiconductor laser from a BRS type buried stripe structure, and resulting laserExpiredSep 07, 89Aug 27, 91[H01L]
5,041,778 Electrooptic measurement systems for frequency analysis of very wide range signalsExpiredJul 17, 89Aug 20, 91[G01R]

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