NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology MATTERS Rank in Class
 
 
G02B OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS 287 40
 
 
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 195 109
 
 
H04B TRANSMISSION 168 72
 
 
G06F ELECTRIC DIGITAL DATA PROCESSING 132 289
 
 
H04N PICTORIAL COMMUNICATION, e.g. TELEVISION 131 103
 
 
H04J MULTIPLEX COMMUNICATION 119 42
 
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 87 247
 
 
G10L SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION 61 40
 
 
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 51 76
 
 
G06K RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS 51 134
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Top Patents (by citation)

Recent Publications

Publication # Title Filing Date Pub Date Intl Class
2016/0335,924 SECRET CALCULATION METHOD, SECRET CALCULATION SYSTEM, RANDOM PERMUTATION DEVICE, AND PROGRAM Jan 07, 15 Nov 17, 16 [H04L, G06F, G09C]
2016/0336,019 LINEAR PREDICTIVE ANALYSIS APPARATUS, METHOD, PROGRAM AND RECORDING MEDIUM Jan 20, 15 Nov 17, 16 [G10L]
2016/0337,119 SECURITY APPARATUS, METHOD THEREOF, AND PROGRAM Feb 17, 15 Nov 17, 16 [H04L]
2016/0330,016 ELEMENT REPLICATION DEVICE, ELEMENT REPLICATION METHOD, AND PROGRAM Nov 28, 14 Nov 10, 16 [H04L]
2016/0330,018 SECURE COMPUTATION METHOD, SECURE COMPUTATION SYSTEM, SECURE COMPUTATION SERVER, REGISTRANT TERMINAL, USER TERMINAL AND PROGRAM Dec 05, 14 Nov 10, 16 [H04L, G06F]
2016/0321,958 SECRET CALCULATION METHOD, SECRET CALCULATION SYSTEM, SORTING DEVICE, AND PROGRAM Jan 07, 15 Nov 03, 16 [G06F, G09C]
2016/0316,224 Video Encoding Method, Video Decoding Method, Video Encoding Apparatus, Video Decoding Apparatus, Video Encoding Program, And Video Decoding Program Dec 24, 14 Oct 27, 16 [H04N]
2016/0295,241 VIDEO ENCODING APPARATUS AND METHOD, VIDEO DECODING APPARATUS AND METHOD, AND PROGRAMS THEREFOR Dec 03, 14 Oct 06, 16 [H04N]
2016/0286,212 VIDEO ENCODING APPARATUS AND METHOD, AND VIDEO DECODING APPARATUS AND METHOD Oct 15, 14 Sep 29, 16 [H04N]
2016/0286,288 Optical Switch Oct 28, 14 Sep 29, 16 [H04Q]

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9,494,743 Optical fiber splicing unit, optical fiber splicing method, and holding member for optical fiber splicing unit Mar 07, 14 Nov 15, 16 [G02B]
9,496,979 Space switch device Aug 02, 12 Nov 15, 16 [H04J, H04Q]
9,497,481 Motion vector predictive encoding method, motion vector predictive decoding method, moving picture encoding apparatus, moving picture decoding apparatus, and programs thereof Feb 08, 11 Nov 15, 16 [H04N]
9,491,455 Picture encoding method, picture decoding method, picture encoding apparatus, picture decoding apparatus, picture encoding program, and picture decoding program Jul 31, 12 Nov 08, 16 [H04N]
9,479,282 Optical communication apparatus, optical route switching apparatus and network Apr 26, 12 Oct 25, 16 [H04L, H04J, H04Q, H04B]
9,479,284 Discovery method, optical communication method, and optical communication system Dec 03, 13 Oct 25, 16 [H04J, H04B]
9,467,755 Optical switch Aug 30, 13 Oct 11, 16 [G02B, H04Q]
9,459,417 Planar lightwave circuit Mar 26, 15 Oct 04, 16 [G02B]
9,455,739 Code amount estimating method and apparatus, and program and storage medium therefor Mar 07, 08 Sep 27, 16 [H04N, H03M]
9,445,089 Video encoding device, video encoding method and video encoding program Mar 06, 12 Sep 13, 16 [H04N]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
9,247,324 Wavelength selection switch system and method for controlling wavelength selection switch Withdrawn Feb 05, 13 Jan 26, 16 [G02B, H04J, H04Q]
2014/0363,337 CHIP FOR OPTICAL ANALYSIS ABAN Aug 25, 14 Dec 11, 14 [G01N]
2014/0133,546 VIDEO ENCODING DEVICE, VIDEO DECODING DEVICE, VIDEO ENCODING METHOD, VIDEO DECODING METHOD, VIDEO ENCODING PROGRAM, AND VIDEO DECODING PROGRAM ABAN Jun 12, 12 May 15, 14 [H04N]
2014/0119,453 VIDEO ENCODING DEVICE, VIDEO DECODING DEVICE, VIDEO ENCODING METHOD, VIDEO DECODING METHOD, VIDEO ENCODING PROGRAM, AND VIDEO DECODING PROGRAM ABAN Jun 12, 12 May 01, 14 [H04N]
2014/0010,229 DATA COMMUNICATION SYSTEM, DATA COMMUNICATION TERMINAL, DATA COMMUNICATIN METHOD, AND COMPUTER PROGRAM ABAN Dec 27, 11 Jan 09, 14 [H04L]
2013/0218,764 ELECTRONIC SETTLEMENT METHOD, SYSTEM, SERVER, AND PROGRAM THEREOF ABAN Mar 18, 13 Aug 22, 13 [G06Q]
2013/0136,187 VIDEO ENCODING METHOD, VIDEO DECODING METHOD, VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, AND PROGRAM THEREOF ABAN Aug 05, 11 May 30, 13 [H04N]
2013/0101,028 ENCODING METHOD, DECODING METHOD, DEVICE, PROGRAM, AND RECORDING MEDIUM ABAN Jul 04, 11 Apr 25, 13 [H04N]
2013/0058,584 IMAGE ENCODING AND DECODING FOR MULTI-VIEWPOINT IMAGES ABAN Sep 12, 12 Mar 07, 13 [G06K]
2012/0320,985 MOTION VECTOR PREDICTIVE ENCODING METHOD, MOTION VECTOR PREDICTIVE DECODING METHOD, MOVING PICTURE ENCODING APPARATUS, MOVING PICTURE DECODING APPARATUS, AND PROGRAMS THEREOF ABAN Feb 04, 11 Dec 20, 12 [H04N]
2012/0294,372 MOTION VECTOR PREDICTIVE ENCODING METHOD, MOTION VECTOR PREDICTIVE DECODING METHOD, MOVING PICTURE ENCODING APPARATUS, MOVING PICTURE DECODING APPARATUS, AND PROGRAMS THEREOF ABAN Feb 08, 11 Nov 22, 12 [H04N]
2012/0288,242 OPTICAL MODULE ABAN May 09, 12 Nov 15, 12 [G02B]
2012/0172,735 BLOOD PRESSURE MEASURING APPARATUS AND BLOOD PRESSURE MEASURING METHOD ABAN Mar 16, 12 Jul 05, 12 [A61B]
2012/0123,788 CODING METHOD, DECODING METHOD, AND DEVICE AND PROGRAM USING THE METHODS ABAN Jun 22, 10 May 17, 12 [H04B, G10L]
8,157,454 Releasable locking mechanism for optical connector Expired Feb 01, 08 Apr 17, 12 [G02B]
8,134,920 Device and method for correcting a path trouble in a communication network Expired Feb 20, 04 Mar 13, 12 [G01R, H04L]
2012/0053,949 ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, DECODING METHOD AND PROGRAM THEREFOR ABAN May 28, 10 Mar 01, 12 [G10L]
8,126,712 Information communication terminal, information communication system, information communication method, and storage medium for storing an information communication program thereof for recognizing speech information Expired Feb 08, 06 Feb 28, 12 [G10L]
8,120,930 Rush current reduction circuit and electric appliance Expired Oct 19, 06 Feb 21, 12 [H02M]
2012/0033,923 HOLEY SINGLE-MODE OPTICAL FIBER AND OPTICAL TRANSMISSION SYSTEM USING SAME ABAN Oct 14, 11 Feb 09, 12 [G02B]

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