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 36
 
 
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 169 107
 
 
H04B TRANSMISSION 156 79
 
 
H04N PICTORIAL COMMUNICATION, e.g. TELEVISION 125 101
 
 
G06F ELECTRIC DIGITAL DATA PROCESSING 123 280
 
 
H04J MULTIPLEX COMMUNICATION 111 46
 
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 86 237
 
 
G10L SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION 58 40
 
 
G06K RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS 54 130
 
 
H01S DEVICES USING STIMULATED EMISSION 50 45
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Top Patents (by citation)

Recent Publications

Publication # Title Filing Date Pub Date Intl Class
2016/0028,719 SEGMENTED SECRET-KEY STORAGE SYSTEM, SEGMENT STORAGE APPARATUS, SEGMENTED SECRET-KEY STORAGE METHOD Jan 16, 14 Jan 28, 16 [H04L]
2016/0011,378 OPTICAL FIBER SPLICING TOOL AND OPTICAL FIBER SPLICING METHOD Feb 28, 14 Jan 14, 16 [G02B]
2016/0014,146 NETWORK MONITORING APPARATUS, NETWORK MONITORING METHOD, AND NETWORK MONITORING PROGRAM Feb 21, 14 Jan 14, 16 [H04L]
2016/0006,525 CLIENT SIGNAL MAPPING CIRCUIT AND MAPPING METHOD Aug 27, 15 Jan 07, 16 [H04J, H04Q]
2015/0372,766 OPTICAL TRANSMISSION SYSTEM, PHASE COMPENSATION METHOD, AND OPTICAL RECEPTION APPARATUS Feb 13, 14 Dec 24, 15 [H04J, H04B]
2015/0373,640 OPTICAL-WIRELESS ACCESS SYSTEM Dec 17, 13 Dec 24, 15 [H04Q, H04W, H04B]
2015/0358,152 TAMPERING DETECTION DEVICE, TAMPERING DETECTION METHOD AND PROGRAM Jan 16, 14 Dec 10, 15 [H04L]
2015/0358,155 SECRET COMPUTATION SYSTEM, ARITHMETIC UNIT, SECRET COMPUTATION METHOD AND PROGRAM Jan 16, 14 Dec 10, 15 [H04L, G06F]
2015/0358,162 DECRYPTION SERVICE PROVIDING DEVICE, PROCESSING DEVICE, SAFETY EVALUATION DEVICE, PROGRAM, AND RECORDING MEDIUM Jan 15, 14 Dec 10, 15 [H04L]
2015/0358,644 VIDEO ENCODING APPARATUS AND METHOD, VIDEO DECODING APPARATUS AND METHOD, AND PROGRAMS THEREFOR Dec 25, 13 Dec 10, 15 [H04N]

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9,252,556 Amplifying optical fiber and optical amplifier Oct 31, 13 Feb 02, 16 [G02B, H01S]
9,252,872 Crosstalk measuring method and crosstalk measuring device Jun 21, 13 Feb 02, 16 [G02B, H04B]
9,252,906 Communication system, transmitter apparatus and receiver apparatus Sep 25, 12 Feb 02, 16 [H04L, H04J, H04B]
9,253,762 Wireless communication system and access point apparatus Apr 25, 12 Feb 02, 16 [H04L, H04W, H04B]
9,247,324 Wavelength selection switch system and method for controlling wavelength selection switch Feb 05, 13 Jan 26, 16 [G02B, H04J, H04Q]
9,239,435 Optical fiber cable having connector and assembling method thereof May 21, 14 Jan 19, 16 [G02B]
9,235,003 Waveguide-type polarization beam splitter Jan 25, 12 Jan 12, 16 [G02B]
9,236,971 Bandwidth allocation device and bandwidth allocation method Dec 18, 12 Jan 12, 16 [H04L, H04J, H04B]
9,230,554 Encoding method for acquiring codes corresponding to prediction residuals, decoding method for decoding codes corresponding to noise or pulse sequence, encoder, decoder, program, and recording medium Feb 08, 12 Jan 05, 16 [H03M, G10L]
9,219,111 Nitride semiconductor structure and method of preparing the same Sep 05, 12 Dec 22, 15 [H01L, C30B]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2013/0058,584 IMAGE ENCODING AND DECODING FOR MULTI-VIEWPOINT IMAGES ABAN Sep 12, 12 Mar 07, 13 [G06K]
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]
2012/0053,949 ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, DECODING METHOD AND PROGRAM THEREFOR ABAN May 28, 10 Mar 01, 12 [G10L]
2011/0304,897 Optical Semiconductor Module and Method for Assembling the Same ABAN Oct 09, 09 Dec 15, 11 [G02B, G02F, H01L]
2011/0273,443 SYSTEM AND A METHOD FOR THREE-DIMENSIONAL MODELING OF A THREE-DIMENSIONAL SCENE FEATURES ABAN Aug 12, 09 Nov 10, 11 [G06T]
8,037,478 Object state transfer method, object state transfer device, object state transfer program, and recording medium for the program Expired Apr 21, 08 Oct 11, 11 [G06F]
8,014,645 Dispersion shifted optical fiber Expired May 16, 03 Sep 06, 11 [G02B]
8,009,994 Optical node device, network control device, maintenance-staff device, optical network, and 3R relay implementation node decision method Withdrawn Apr 02, 09 Aug 30, 11 [H04B]
2011/0170,832 OPTICAL TRANSCEIVER MODULE AND METHOD OF MANUFACTURING THE OPTICAL TRANSCEIVER MODULE ABAN Jan 04, 11 Jul 14, 11 [B23P, G02B]
7,977,036 Resist pattern forming method Expired Jan 27, 06 Jul 12, 11 [G03F]
2011/0141,458 Coated Optical Fiber Identifying Apparatus and Coated Optical Fiber Identifying Method ABAN Jun 30, 09 Jun 16, 11 [G01N]
2011/0132,786 PACKING CONFIGURATION OF CABLE ABAN Aug 06, 09 Jun 09, 11 [B65D]
2011/0128,848 CAPACITY VARIABLE LINK APPARATUS AND CAPACITY VARIABLE LINK SETTING METHOD ABAN Feb 08, 11 Jun 02, 11 [H04L]
2011/0116,745 OPTICAL CONNECTOR, AND ASSEMBLING METHOD OF OPTICAL CONNECTOR ABAN Jan 24, 11 May 19, 11 [G02B]
2011/0108,579 PUMP RETENTION COLLAR AND METHODS FOR USING THE SAME ABAN May 19, 09 May 12, 11 [G01F, B65D]
7,941,361 System and method for quantitative competition and recording medium having recorded thereon program for implementing the method Expired Jun 22, 09 May 10, 11 [G06Q]
7,912,087 Capacity variable link apparatus and capacity variable link setting method Expired Jan 21, 03 Mar 22, 11 [G01R, H04J]
7,907,895 Electric field sensor device, transceiver, positional information obtaining system and information input system Expired Jun 29, 04 Mar 15, 11 [H04B]

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