CSELT - CENTRO STUDI E LABORATORI TELECOMUNICAZIONI S.P.A.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
 
 
G10L SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION 576
 
 
 
H04J MULTIPLEX COMMUNICATION 4111
 
 
 
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 4217
 
 
 
H01P WAVEGUIDES; RESONATORS, LINES OR OTHER DEVICES OF THE WAVEGUIDE TYPE 349
 
 
 
H03D DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER 342
 
 
 
H03L AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES 368
 
 
 
G06F ELECTRIC DIGITAL DATA PROCESSING 2390
 
 
 
G06T IMAGE DATA PROCESSING OR GENERATION, IN GENERAL 298
 
 
 
H04N PICTORIAL COMMUNICATION, e.g. TELEVISION 2205
 
 
 
G01N INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 1172

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6,760,395 Device for timing reconstruction of a data channel transported on a packet network and its processJun 20, 00Jul 06, 04[H04J, H04L, H03D]
6,665,643 Method of and apparatus for animation, driven by an audio signal, of a synthesized model of a human faceSep 28, 99Dec 16, 03[G06T, G10L]
6,625,228 Method of and a device for digital signal transmissionDec 30, 99Sep 23, 03[H04L]
6,571,313 Memory for information search through prefix analysis, in particular for building routing tables for nodes of high speed communication networks, such as the internet networkOct 20, 99May 27, 03[G06F]
6,532,011 Method of creating 3-D facial models starting from face imagesSep 29, 99Mar 11, 03[G06T]
6,292,039 Integrated circuit phase-locked loop charge pumpJun 20, 00Sep 18, 01[H03C]
6,259,327 PLL having circuits for selecting optimum VCO input/output characteristicsNov 12, 99Jul 10, 01[H03L]
6,255,881 High tunability CMOS delay elementNov 17, 99Jul 03, 01[H03K]
6,229,599 Apparatus for measuring characteristics of an optical fiberJul 26, 99May 08, 01[G01N]
6,194,909 Constructive module of an electronic telecommunications equipment, with an interface towards a testing and diagnosing systemAug 05, 98Feb 27, 01[G01R]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6,826,185 Encoded audio-video streams remultiplexing equipmentExpiredMay 12, 00Nov 30, 04[H04L]
6,307,980 Method and apparatus for introducing reference impairments into video signalsExpiredNov 24, 98Oct 23, 01[G06K]
6,218,886 Device for compensating process and operating parameter variations in CMOS integrated circuitsExpiredDec 01, 99Apr 17, 01[H03K]
5,790,058 Serializing-parallelizing circuit for high speed digital signalsExpiredSep 26, 96Aug 04, 98[H03M]
5,686,849 Circuit for clock signal extraction from a high speed data streamExpiredFeb 22, 96Nov 11, 97[H03L]
5,663,962 Method of multiplexing streams of audio-visual signals coded according to standard MPEG1ExpiredSep 15, 95Sep 02, 97[H04N]
5,589,786 High-speed CMOS driver for optical sourcesExpiredJun 01, 95Dec 31, 96[H03K]
5,557,611 ATM cross-connect node utilizing two passes through the connection network with shaping between passes for optimal resource allocation in a bursty environmentExpiredJul 19, 95Sep 17, 96[H04L, H04Q]
5,359,682 Method of adjusting the operation characteristics of integrated optical devicesExpiredAug 17, 92Oct 25, 94[G02B]
5,329,394 Frequency modulation coherent optical communications system with continuous polarization scramblingExpiredMay 15, 92Jul 12, 94[H04B]
5,269,888 Method of fabricating integrated optical devices by means of field-assisted ion exchangeExpiredApr 02, 91Dec 14, 93[C25F]
5,271,082 Method of fabricating integrated optical guides of glassExpiredFeb 27, 92Dec 14, 93[G02B]
5,263,036 Pump system for waveguide lasers or amplifiersExpiredJan 17, 92Nov 16, 93[H01S]
5,257,126 Coherent optical fiber communications system using polarization modulationExpiredMay 15, 92Oct 26, 93[H04B]
5,212,461 Orthomode transducer between a circular waveguide and a coaxial cableExpiredMay 09, 91May 18, 93[H01P]
5,197,075 Apparatus and method for the generation of modulated optical signals using a semiconductor laserExpiredDec 10, 91Mar 23, 93[H01S]
5,160,973 System for measuring the refractive index profile of optical componentsExpiredOct 18, 91Nov 03, 92[G01N]
5,155,397 C-MOS differential sense amplifierExpiredDec 19, 90Oct 13, 92[G11C]
5,142,362 Method of hydrid digital coding distinguishing motion pictures from still picturesExpiredFeb 20, 91Aug 25, 92[H04N]
5,128,538 Vapor effusion source for epitaxial deposition plantsExpiredApr 02, 91Jul 07, 92[H05H]

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