NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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11 2,402 total patents issued
959 Total Apps Published
Jun 11, 2013 most recent publication

Details

2,402 Issued Patents
219 Issued in last 3 years
279 Published in last 3 years

39,281 Total Citation Count
Mar 02, 1977 Earliest Filing
1,204 Expired/Abandoned/Withdrawn Patents

Technologies

G02B OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS 241 32

Subclasses

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H04B TRANSMISSION 106 70

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G06F ELECTRIC DIGITAL DATA PROCESSING 103 206

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H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 99 81

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H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 81 181

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H04J MULTIPLEX COMMUNICATION 81 44

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G06K RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS 53 92

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H04N PICTORIAL COMMUNICATION, e.g. TELEVISION 53 103

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H01S DEVICES USING STIMULATED EMISSION 52 42

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G10L SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION 42 34

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Top Patents (by citation)

5,280,537 Digital communication system using superposed transmission of high speed and low speed digital signals Nov 24, 92 Jan 18, 94 [H04J, H04L] 256

5,162,933 Active matrix structure for liquid crystal display elements wherein each of the gate/data lines includes at least a molybdenum-base alloy layer containing 0.5 to 10 wt. % of chromium May 10, 91 Nov 10, 92 [G02F, H01L] 173

5,718,628 Air conditioning method in machine room having forced air-cooling equipment housed therein Apr 26, 96 Feb 17, 98 [H05K] 142

5,736,982 Virtual space apparatus with avatars and speech Aug 01, 95 Apr 07, 98 [G06F] 141

5,214,730 Multifiber optical connector plug with low reflection and low insertion loss May 07, 92 May 25, 93 [G02B] 136

6,266,370 Brightness-variation compensation method and coding/decoding apparatus for moving pictures Aug 29, 97 Jul 24, 01 [H04N] 129

6,456,658 Brightness-variation compensation method and coding/decoding apparatus for moving pictures Apr 11, 01 Sep 24, 02 [H04N] 115

5,224,162 Electronic cash system Jun 08, 92 Jun 29, 93 [H04K] 112

5,400,329 Packet network and method for congestion avoidance in packet networks Apr 27, 93 Mar 21, 95 [H04J] 106

5,374,937 Retractable antenna system Jan 28, 94 Dec 20, 94 [H01Q] 106

Recent Publications

2013/0136,187 VIDEO ENCODING METHOD, VIDEO DECODING METHOD, VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, AND PROGRAM THEREOF Aug 05, 11 May 30, 13 [H04N]

2013/0136,393 OPTICAL COMPONENT Aug 02, 11 May 30, 13 [G02B]

2013/0136,409 HOLE-ASSISTED OPTICAL FIBER Jan 31, 13 May 30, 13 [G02B]

2013/0128,980 MOTION VECTOR PREDICTIVE ENCODING METHOD, MOTION VECTOR DECODING METHOD, PREDICTIVE ENCODING APPARATUS AND DECODING APPARATUS, AND STORAGE MEDIA STORING MOTION VECTOR PREDICTIVE ENCODING AND DECODING PROGRAMS Jan 10, 13 May 23, 13 [H04N]

2013/0128,984 VIDEO ENCODING METHOD, VIDEO DECODING METHOD, VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, AND PROGRAMS THEREOF Aug 10, 11 May 23, 13 [H04N]

2013/0118,262 Constituent Concentration Measuring Apparatus and Constituent Concentration Measuring Apparatus Controlling Method Nov 05, 12 May 16, 13 [G01N]

2013/0123,590 Constituent Concentration Measuring Apparatus and Constituent Concentration Measuring Apparatus Controlling Method Nov 05, 12 May 16, 13 [A61B]

2013/0123,591 Constituent Concentration Measuring Apparatus and Constituent Concentration Measuring Apparatus Controlling Method Nov 05, 12 May 16, 13 [A61B]

2013/0114,733 ENCODING METHOD, DECODING METHOD, DEVICE, PROGRAM, AND RECORDING MEDIUM Jul 04, 11 May 09, 13 [H04N]

2013/0114,810 CRYPTOGRAPHIC SYSTEM, CRYPTOGRAPHIC COMMUNICATION METHOD, ENCRYPTION APPARATUS, KEY GENERATION APPARATUS, DECRYPTION APPARATUS, CONTENT SERVER, PROGRAM, AND STORAGE MEDIUM Jul 22, 11 May 09, 13 [H04L]

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Recent Patents

8,462,410 Mirror device, mirror array, optical switch, mirror device manufacturing method, and mirror substrate manufacturing method Mar 05, 12 Jun 11, 13 [G02B]

8,462,617 Method for relieving failure, and packet communication device Sep 19, 06 Jun 11, 13 [G01R]

8,462,827 Photonic crystal device Sep 01, 10 Jun 11, 13 [H01S]

8,463,097 Planar lightwave circuit, design method for wave propagation circuit, and computer program Jul 12, 10 Jun 11, 13 [G02B]

8,458,478 Signature generating apparatus, signature verifying apparatus, and methods and programs therefor Apr 24, 08 Jun 04, 13 [H04L]

8,451,894 Video encoding method and decoding method, apparatuses therefor, programs therefor, and storage media for storing the programs by using parallax compensation Jan 04, 07 May 28, 13 [H04N]

8,437,638 Optical modulation circuit and optical transmission system Jul 04, 08 May 07, 13 [H04J, H04B]

8,432,470 Data conversion/output apparatus for digitalizing sensor data and outputting through a sensor array Feb 22, 11 Apr 30, 13 [H04N]

8,428,137 Motion search apparatus in video coding Sep 12, 08 Apr 23, 13 [H04B]

8,422,360 Route switching method, server, boundary node apparatus, route switching system, and route switching program Jun 30, 09 Apr 16, 13 [H04J]

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