MITEL CORPORATION

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H04M TELEPHONIC COMMUNICATION 9154
 
  
 
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 6279
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 5442
 
  
 
H04J MULTIPLEX COMMUNICATION 4121
 
  
 
H04Q SELECTING 4106
 
  
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 3359
 
  
 
G08B SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS 292
 
  
 
H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS 275
 
  
 
H03D DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER 247
 
  
 
H03F AMPLIFIERS 182

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7747013 Early detection system and method for encrypted signals within packet networksFeb 24, 05Jun 29, 10[H04L]
7328271 Method of controlling telephone connections for internet protocol communicationsMar 05, 01Feb 05, 08[G06F]
6795969 Transfer of basic knowledge to agentsOct 11, 01Sep 21, 04[G06F]
6748065 Distributed automatic route selection using RIP cachingFeb 16, 01Jun 08, 04[H04M]
6741558 Method and apparatus for event detection in a switching systemJun 30, 99May 25, 04[H04L]
6690793 Click free mute switch circuit for telephonesMay 16, 00Feb 10, 04[H04M]
6259750 Digital phase reversal detectorJun 25, 98Jul 10, 01[H04L]
6167127 Telephone system using recorded messages to make outbound announcementsJul 15, 97Dec 26, 00[H04M]
6163850 Method of selecting between multiple clock drive sources for a backplane clock signalNov 17, 98Dec 19, 00[G06F]
5991784 Signal processing circuitApr 24, 97Nov 23, 99[G06F]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6775294 Time slot assigner for communication systemExpiredJul 10, 01Aug 10, 04[H04L]
6522747 Single-sided subband filtersExpiredNov 23, 99Feb 18, 03[H04M]
6507579 Digital switch rate conversionExpiredJun 25, 99Jan 14, 03[H04L]
6414831 Low leakage electrostatic discharge protection systemExpiredFeb 09, 99Jul 02, 02[H02H]
6355958 Spark gap for hermetically packaged integrated circuitsExpiredFeb 09, 99Mar 12, 02[H01L]
6343303 Method of determining a scaling factorExpiredMay 19, 99Jan 29, 02[G06F]
6323599 Vertical spark gap for microelectric circuitsExpiredFeb 09, 99Nov 27, 01[H05B]
2001/0041,542 MODULATED LOCAL OSCILLATORAbandonedAug 26, 98Nov 15, 01[H04B]
2001/0013,860 Keyboard matrix expansionAbandonedFeb 12, 01Aug 16, 01[G09G]
6259703 Time slot assigner for communication systemExpiredJul 27, 99Jul 10, 01[H04L, H04Q]
6215251 Spark gap for high voltage integrated circuit electrostatic discharge protectionExpiredFeb 09, 99Apr 10, 01[H05B]
6212309 Optical cross point switch using deformable micromirrorExpiredJan 21, 99Apr 03, 01[G02B]
6204164 Method of making electrical connections to integrated circuitExpiredApr 29, 98Mar 20, 01[H01L]
6148184 Radio frequency zero if direct down converterExpiredJul 23, 98Nov 14, 00[H04B]
6144674 Hitless clock recovery in ATM networksExpiredAug 25, 97Nov 07, 00[H04L, H04J]
5999533 ATM cell transmit priority allocatorExpiredJun 23, 97Dec 07, 99[H04L, H04Q]
5960209 Scaleable digital signal processor with parallel architectureExpiredMar 11, 96Sep 28, 99[G06F]
5933087 Selection and controlExpiredOct 23, 97Aug 03, 99[H04Q]
5818834 Serial bit rate converter embedded in a switching matrixExpiredMar 11, 96Oct 06, 98[H04L]
5784453 Multiple owner resource managementWithdrawnNov 04, 96Jul 21, 98[]

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