NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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Technologies

Intl Class Technology # of Patents Rank
 
 
G02B OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS 255 32
 
 
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 110 81
 
 
H04B TRANSMISSION 107 74
 
 
G06F ELECTRIC DIGITAL DATA PROCESSING 102 226
 
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 83 189
 
 
H04J MULTIPLEX COMMUNICATION 82 46
 
 
H04N PICTORIAL COMMUNICATION, e.g. TELEVISION 61 105
 
 
G06K RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS 54 96
 
 
H01S DEVICES USING STIMULATED EMISSION 52 42
 
 
G10L SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION 42 38
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Top Patents (by citation)

Recent Publications

Publication # Title Filing Date Pub Date Intl Class
2014/0097,901 AUTOMATIC GAIN CONTROL CIRCUIT Jun 29, 12 Apr 10, 14 [H03G]
2014/0098,362 OPTICAL FIBER LINE CHARACTERISTIC ANALYSIS APPARATUS AND ANALYSIS METHOD THEREOF May 31, 12 Apr 10, 14 [G01M]
2014/0098,709 PATH CALCULATING METHOD, PROGRAM AND CALCULATING APPARATUS Dec 12, 13 Apr 10, 14 [H04L]
2014/0050,178 WIRELESS COMMUNICATION SYSTEM AND ACCESS POINT APPARATUS Apr 26, 12 Feb 20, 14 [H04W]
2014/0023,333 OPTICAL COMPONENT Apr 18, 12 Jan 23, 14 [G02B]
2014/0016,929 METHOD FOR ESTIMATING AMOUNT OF WAVELENGTH DISPERSION, WAVELENGTH DISPERSION COMPENSATION CIRCUIT, AND RECEIVING DEVICE Jan 24, 12 Jan 16, 14 [H04B]
2014/0016,949 OPTICAL SIGNAL DETECTION CIRCUIT AND OPTICAL RECEIVER Jan 25, 12 Jan 16, 14 [H04B]
2014/0019,145 ENCODING METHOD, DECODING METHOD, ENCODER, DECODER, PROGRAM, AND RECORDING MEDIUM Mar 26, 12 Jan 16, 14 [G10L]
2014/0010,229 DATA COMMUNICATION SYSTEM, DATA COMMUNICATION TERMINAL, DATA COMMUNICATIN METHOD, AND COMPUTER PROGRAM Dec 27, 11 Jan 09, 14 [H04L]
2014/0003,511 IMAGE ENCODING METHOD, IMAGE DECODING METHOD, IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING PROGRAM, AND IMAGE DECODING PROGRAM Mar 13, 12 Jan 02, 14 [H04N]

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
8,694,677 Retry communication control method and system Jul 30, 03 Apr 08, 14 [G06F]
8,687,968 Vector sum phase shifter, optical transceiver, and control circuit Aug 12, 09 Apr 01, 14 [H04B]
8,687,973 Voltage generator, control circuit, vector sum phase shifter, and optical transceiver Aug 12, 09 Apr 01, 14 [H04B]
8,675,735 Predicted reference information generating method, video encoding and decoding methods, apparatuses therefor, programs therefor, and storage media which store the programs Dec 12, 12 Mar 18, 14 [H04N]
8,663,560 Flow cell and liquid delivery method May 26, 09 Mar 04, 14 [G01N]
8,665,945 Encoding method, decoding method, encoding device, decoding device, program, and recording medium Mar 05, 10 Mar 04, 14 [H04B]
8,666,312 Electric-field communication device Mar 21, 08 Mar 04, 14 [H04B]
8,666,744 Grammar fragment acquisition using syntactic and semantic clustering Sep 21, 00 Mar 04, 14 [G10L]
8,667,120 Load control device and method thereof for controlling requests sent to a server Apr 25, 07 Mar 04, 14 [H04L, G06F]
8,667,170 Address conversion method, access control method, and device using these methods Apr 14, 05 Mar 04, 14 [G06F]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Filing Date Issue/Pub Date Intl Class
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]
2011/0116,745 OPTICAL CONNECTOR, AND ASSEMBLING METHOD OF OPTICAL CONNECTOR Jan 24, 11 May 19, 11 [G02B]
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]
2010/0217,990 COMMUNICATION METHOD, RELAY SERVER DEVICE, PROGRAM, AND RECORDING MEDIUM May 28, 08 Aug 26, 10 [H04L, G06F]
2010/0169,425 Electronic Mail Delivery System And Electronic Mail Delivery Program Mar 29, 07 Jul 01, 10 [G06F]
2010/0021,103 WAVELENGTH BLOCKER Sep 21, 07 Jan 28, 10 [G02B, G02F]
2009/0303,486 LIGHT SOURCE AND GAS MEASURING DEVICE Jun 20, 07 Dec 10, 09 [H01S, G01N]
2009/0273,790 WAVELENGTH-TUNABLE LIGHT GENERATOR AND OPTICAL COHERENCE TOMOGRAPHY DEVICE Jun 15, 09 Nov 05, 09 [G01B]
7,599,595 Semiconductor optoelectronic waveguide Oct 04, 04 Oct 06, 09 [G02B]
7,570,567 Multi-layered holographic read-only memory and data retrieval method Sep 30, 04 Aug 04, 09 [G11B]
7,536,020 Wearable communication device May 13, 05 May 19, 09 [A61N, H04M, A63B, H04R, H04B, H03K, G04C]
2009/0094,692 SESSION CONTROL SERVER, COMMUNICATION DEVICE, COMMUNICATION SYSTEM AND COMMUNICATION METHOD, AND PROGRAM AND RECORDING MEDIUM FOR THE SAME Oct 03, 08 Apr 09, 09 [H04L, G06F]
2009/0041,415 DOUBLE-CORE OPTICAL FIBER Mar 23, 07 Feb 12, 09 [G02B]
7,483,446 Packet transmission device and packet transmission system Mar 23, 04 Jan 27, 09 [H04J]
2009/0022,903 METHOD FOR MANUFACTURING A PERIODICALLY-POLED STRUCTURE Mar 17, 06 Jan 22, 09 [B29C]
7,474,664 ATM switch for ensuring cell sequence Oct 22, 04 Jan 06, 09 [H04L]
2009/0002,713 Optical Coherence Tomography System Jan 19, 06 Jan 01, 09 [G01B]
2008/0252,901 Wavelength-Tunable Light Source And Optical Coherence Tomography Sep 22, 04 Oct 16, 08 [G01B]
2008/0253,776 Optical Signal Receiver Aug 05, 05 Oct 16, 08 [H04B]

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