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 286 35
 
 
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 146 96
 
 
H04B TRANSMISSION 143 73
 
 
G06F ELECTRIC DIGITAL DATA PROCESSING 121 269
 
 
H04N PICTORIAL COMMUNICATION, e.g. TELEVISION 114 102
 
 
H04J MULTIPLEX COMMUNICATION 104 44
 
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 90 222
 
 
G10L SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION 56 39
 
 
G06K RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS 52 120
 
 
H01S DEVICES USING STIMULATED EMISSION 50 48
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Top Patents (by citation)

Recent Publications

Publication # Title Filing Date Pub Date Intl Class
2015/0049,997 OPTICAL FIBER RIBBON AND OPTICAL FIBER CABLE HOUSING THE OPTICAL FIBER RIBBON Aug 28, 14 Feb 19, 15 [G02B]
2015/0046,172 ENCODING METHOD, DECODING METHOD, ENCODER, DECODER, PROGRAM AND RECORDING MEDIUM May 22, 13 Feb 12, 15 [G10L]
2015/0035,625 INDUCTOR Sep 14, 11 Feb 05, 15 [H03H, H01F]
2015/0036,210 OPTICAL AMPLIFIER DEVICE Jan 20, 12 Feb 05, 15 [H01S]
2015/0030,327 WAVELENGTH SELECTION SWITCH SYSTEM AND METHOD FOR CONTROLLING WAVELENGTH SELECTION SWITCH Feb 05, 13 Jan 29, 15 [H04Q]
2015/0032,445 NOISE ESTIMATION APPARATUS, NOISE ESTIMATION METHOD, NOISE ESTIMATION PROGRAM, AND RECORDING MEDIUM Jan 30, 13 Jan 29, 15 [G10L]
2015/0010,061 VIDEO ENCODING METHOD, DEVICE AND PROGRAM Jan 22, 13 Jan 08, 15 [H04N]
2015/0010,147 CRYPTOGRAPHIC SYSTEM, CRYPTOGRAPHIC METHOD, AND CRYPTOGRAPHIC PROGRAM Mar 01, 13 Jan 08, 15 [H04L]
2015/0003,822 SELF-DIAGNOSTIC METHOD FOR PON PROTECTION SYSTEM, AND PON PROTECTION SYSTEM Nov 15, 12 Jan 01, 15 [H04Q, H04B]
2014/0375,473 SENSOR TERMINAL AND SENSOR NETWORK SYSTEM Feb 08, 13 Dec 25, 14 [G01D]

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
8,964,581 Bandwidth variable communication method, bandwidth variable communication apparatus, transmission bandwidth determination apparatus, transmission bandwidth determination method, node apparatus, communication path setting system, communication path setting Sep 13, 10 Feb 24, 15 [H04J, H04L, H04B]
8,964,982 Cryptographic system, cryptographic communication method, encryption apparatus, key generation apparatus, decryption apparatus, content server, program, and storage medium Apr 23, 10 Feb 24, 15 [H04K, H04L]
8,964,988 Secret sharing system, sharing apparatus, share management apparatus, acquisition apparatus, secret sharing method, program and recording medium Jul 22, 11 Feb 24, 15 [H04L]
8,965,146 Advanced-format optical modulator with low power consumption and low-loss characteristics Jul 09, 10 Feb 24, 15 [G02B, G02F]
8,953,805 Authentication information generating system, authentication information generating method, client apparatus, and authentication information generating program for implementing the method Mar 03, 09 Feb 10, 15 [H04L, G06F]
8,948,546 Optical frequency shifter and optical modulator using the same Feb 15, 12 Feb 03, 15 [G02B, G02F, H04B]
8,938,068 Functional encryption applied system, information output apparatus, information processing apparatus, encryption protocol execution method, information output method, information processing method, program and recording medium Jul 30, 10 Jan 20, 15 [H04L]
8,938,623 Cryptographic processing system, key generation device, encryption device, decryption device, cryptographic processing method, and cryptographic processing program Dec 06, 11 Jan 20, 15 [H04L, G06F]
8,934,782 Transmission method, reception method, transmitter apparatus, and receiver device Feb 03, 11 Jan 13, 15 [H04J, G02F, H04B]
8,928,868 Optical fiber line characteristic analysis apparatus and analysis method thereof May 31, 12 Jan 06, 15 [G01N, G01M]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Filing Date Issue/Pub Date Intl Class
2013/0058,584 IMAGE ENCODING AND DECODING FOR MULTI-VIEWPOINT IMAGES Sep 12, 12 Mar 07, 13 [G06K]
2012/0172,735 BLOOD PRESSURE MEASURING APPARATUS AND BLOOD PRESSURE MEASURING METHOD Mar 16, 12 Jul 05, 12 [A61B]
2012/0123,788 CODING METHOD, DECODING METHOD, AND DEVICE AND PROGRAM USING THE METHODS Jun 22, 10 May 17, 12 [H04B, G10L]
2011/0304,897 Optical Semiconductor Module and Method for Assembling the Same 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 Aug 12, 09 Nov 10, 11 [G06T]
8,009,994 Optical node device, network control device, maintenance-staff device, optical network, and 3R relay implementation node decision method Apr 02, 09 Aug 30, 11 [H04B]
2011/0170,832 OPTICAL TRANSCEIVER MODULE AND METHOD OF MANUFACTURING THE OPTICAL TRANSCEIVER MODULE Jan 04, 11 Jul 14, 11 [B23P, G02B]
2011/0141,458 Coated Optical Fiber Identifying Apparatus and Coated Optical Fiber Identifying Method Jun 30, 09 Jun 16, 11 [G01N]
2011/0132,786 PACKING CONFIGURATION OF CABLE Aug 06, 09 Jun 09, 11 [B65D]
2011/0128,848 CAPACITY VARIABLE LINK APPARATUS AND CAPACITY VARIABLE LINK SETTING METHOD Feb 08, 11 Jun 02, 11 [H04L]
2011/0116,745 OPTICAL CONNECTOR, AND ASSEMBLING METHOD OF OPTICAL CONNECTOR Jan 24, 11 May 19, 11 [G02B]
2011/0108,579 PUMP RETENTION COLLAR AND METHODS FOR USING THE SAME May 19, 09 May 12, 11 [G01F, B65D]
2011/0026,585 VIDEO QUALITY OBJECTIVE ASSESSMENT METHOD, VIDEO QUALITY OBJECTIVE ASSESSMENT APPARATUS, AND PROGRAM Mar 23, 09 Feb 03, 11 [H04N]
2011/0013,694 VIDEO QUALITY OBJECTIVE ASSESSMENT METHOD, VIDEO QUALITY OBJECTIVE ASSESSMENT APPARATUS, AND PROGRAM Mar 23, 09 Jan 20, 11 [H04N, G06K]
7,859,666 Electric field sensor Jul 28, 04 Dec 28, 10 [G01R]
2010/0285,612 FLOW RATE MEASUREMENT APPARATUS, ANTIGEN CONCENTRATION MEASUREMENT APPARATUS, FLOW CELL, FLOW RATE MEASUREMENT METHOD, AND ANTIGEN CONCENTRATION MEASURING METHOD Jan 15, 09 Nov 11, 10 [G01N]
2010/0245,051 Communication Method for Noncontact RF ID System, Noncontact RF ID System, and Transmitter and Receiver Jun 11, 10 Sep 30, 10 [H04Q]
2010/0247,039 OPTICAL CONNECTOR AND METHOD OF ASSEMBLING THE SAME May 09, 08 Sep 30, 10 [G02B, H05K]
2010/0233,033 FLOW CELL AND METHOD FOR MANUFACTURING THE SAME Jun 26, 07 Sep 16, 10 [B44C, B01L, B81B, B32B, B05D, G01N]
7,787,736 Semiconductor optoelectronic waveguide Jul 15, 08 Aug 31, 10 [G02B]

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