KOREA TELECOM

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 12273
 
  
 
G02B OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS 11194
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 11436
 
  
 
H04B TRANSMISSION 8202
 
  
 
H04J MULTIPLEX COMMUNICATION 8117
 
  
 
H04N PICTORIAL COMMUNICATION, e.g. TELEVISION 7235
 
  
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 4358
 
  
 
C04B LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS 365
 
  
 
H01P WAVEGUIDES; RESONATORS, LINES OR OTHER DEVICES OF THE WAVEGUIDE TYPE 357
 
  
 
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 2131

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7639384 Method for controlling error of internet fax dataDec 11, 07Dec 29, 09[H03M, G06F]
7200147 Method for analyzing address for next generation integrated network serviceNov 14, 02Apr 03, 07[H04L]
7193615 Method for providing mobile terminal with software keyboard suitable for language used in country where it is locatedDec 14, 00Mar 20, 07[G09G]
7065085 Method for summarizing default address of PNNI lowest level node in ATM switching systemMar 12, 02Jun 20, 06[H04L]
6957380 Method for network adaptive error control FolPSep 05, 02Oct 18, 05[H03M]
6950934 Method for managing certificate revocation list by distributing itDec 14, 00Sep 27, 05[H04L]
6915423 Method of providing time stamping service for setting client's system clockJan 30, 01Jul 05, 05[H04L]
6868112 Apparatus and method for detecting signals of space-time coding based on transmission diversityDec 28, 00Mar 15, 05[H04B]
6853676 Apparatus and method for inserting and detecting watermark based on stochastic modelDec 14, 00Feb 08, 05[H04B, H04K]
6847679 Apparatus and method for communicating signal in asymmetric digital subscriber line network by using dual link discrete multi-toneDec 13, 99Jan 25, 05[H04L, H04B]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7330283 Method for controlling error of internet fax dataExpiredAug 29, 02Feb 12, 08[G06F]
7274654 Method for sharing backup path in MPLS network, label switching router for setting up backup in MPLS network, and system thereforExpiredJun 20, 02Sep 25, 07[G08C]
7092635 Apparatus and method for stimulated Brillouin scattering suppression using supervisory channelExpiredDec 20, 00Aug 15, 06[H04J]
7006504 VC merging apparatus and method for establishing/terminating connection thereofExpiredOct 15, 01Feb 28, 06[H04J]
6919824 Keypad assembly with supplementary buttons and method for operating the sameExpiredApr 18, 02Jul 19, 05[H03K, H03M]
6904047 Cell scheduling method of input and output buffered switch using simple iterative matching algorithmExpiredMay 17, 01Jun 07, 05[H04L]
2005/0094,599 Method for handoff between PDSNAbandonedAug 19, 04May 05, 05[H04Q]
6653162 Fabrication method of optical device having current blocking layer of buried ridge structureExpiredApr 03, 02Nov 25, 03[H01L, H03S]
6596558 Method for fabricating optical devices with defectless and antireflecting spot size converterExpiredMar 04, 02Jul 22, 03[H01L]
6597838 Grating-assisted co-directional vertical coupler optical filter having well-suppressed sidelobe characteristics and method of fabricating the sameExpiredAug 18, 98Jul 22, 03[G02B]
2003/0101,276 Parallel lookup engine and method for fast packet forwarding in network routerAbandonedJan 11, 02May 29, 03[G06F]
6570864 Integrated receiving apparatus of subtractive interference cancellation receiver and adaptive MMSE receiverExpiredNov 16, 99May 27, 03[H04Q]
2003/0046,081 Auto attendant system and its method and call forwarding method using speech recognitionAbandonedDec 28, 00Mar 06, 03[G10L]
6469814 Apparatus and method for detecting channel information from WDM optical signal by using wavelength selective photo detectorExpiredOct 29, 99Oct 22, 02[H04J]
2002/0101,926 Block matching motion estimator reducing its clock cycles and method thereofAbandonedDec 29, 00Aug 01, 02[H04N]
6424664 Brillouin/erbuim fiber laser outputting dual spacing multiwavelength lightExpiredFeb 03, 00Jul 23, 02[H01S]
6411600 Asynchronous transfer mode (ATM) protection triggering method using "receive-AIS (alarm indication signal)" flagExpiredAug 06, 98Jun 25, 02[H04L]
6406932 Fabrication of high power semiconductor lasers with ridge waveguide structureExpiredApr 12, 01Jun 18, 02[H01L]
2002/0072,355 Method for distributing application software in mobile communication systemAbandonedMay 04, 01Jun 13, 02[H04M]
2002/0073,322 Countermeasure against denial-of-service attack on authentication protocols using public key encryptionAbandonedDec 28, 00Jun 13, 02[H04L]

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