MATRA COMMUNICATION

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H04B TRANSMISSION 2208
 
  
 
H04J MULTIPLEX COMMUNICATION 1124
 
  
 
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 1284
 
  
 
H04M TELEPHONIC COMMUNICATION 1162

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
D408397 TelephoneDec 19, 97Apr 20, 99[1403]
5509028 Radio transmission method using repeater stations with spectrum reversalMar 21, 94Apr 16, 96[H04L, H04B]
5448286 Process and terminal for video telephony permitting acceptance, and possibly calling, by a telephone setJan 18, 94Sep 05, 95[H04M]
5398247 TDMA radio-communication methodMar 30, 93Mar 14, 95[H04B, H04J]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6052576 Radiocommunications equipment with a security calls mode, and extension unit forming part of such equipmentExpiredJul 07, 97Apr 18, 00[H04K]
5899968 Speech coding method using synthesis analysis using iterative calculation of excitation weightsExpiredOct 14, 97May 04, 99[G10L]
5850403 Process of selectively protecting information bits against transmission errorsExpiredNov 12, 96Dec 15, 98[H03M]
5818866 Method of selecting propagation delays retained for receiving messages transmitted by spread spectrum radio communicationExpiredJul 19, 96Oct 06, 98[H04J]
5790942 Frequency modulation radio transmission deviceExpiredMay 30, 96Aug 04, 98[H03L]
5751188 FM demodulator using a switched capacitor phase shifterExpiredDec 10, 96May 12, 98[H03D]
5640125 Digital PSK-type demodulator having clock recovery before carrier recoveryExpiredDec 13, 95Jun 17, 97[H04L]
D377489 Portable radiotelephoneExpiredJan 11, 96Jan 21, 97[]
5448600 Method for selecting propagation paths retained for receiving messages transmitted by CDMA radiocommunicationExpiredAug 12, 94Sep 05, 95[H04J]
5412724 Method of making up a digital multiplex, and apparatus implementing said methodExpiredDec 13, 93May 02, 95[H04N]
5347315 Modular encoder for generating a digital multiplex signal and decoder for processing such a signalExpiredJan 12, 93Sep 13, 94[H04N]
5323455 Ringer circuit, particularly for a telephone setExpiredJun 16, 93Jun 21, 94[H04M]
5280479 Device for insertion of digital packets in a transmission channelExpiredJun 17, 92Jan 18, 94[H04J]
D338874 Cabinet for PBX circuitsExpiredFeb 28, 92Aug 31, 93[]
D331758 Telephone setExpiredFeb 12, 91Dec 15, 92[]
D331759 Telephone setExpiredFeb 12, 91Dec 15, 92[]
D330377 Handset telephoneExpiredDec 13, 90Oct 20, 92[]
D324682 Telephone setExpiredJun 25, 90Mar 17, 92[]
5059817 Narrow pulse generatorExpiredJul 17, 90Oct 22, 91[H03K]
D311918 Telephone setExpiredMay 25, 89Nov 06, 90[]

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