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Nippon Telegraph and Telephone Corporation

USPTO Granted Patents = 5,289

CIPO Patents = 154

EPO Patents = 1,270

Forward Citations = 44,627

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4,846 inventors (with patents filed for the assignee):

Takehiro Moriya (138 out of 142 patents)

Yutaka Kamamoto (119 out of 123 patents)

Noboru Harada (98 out of 98 patents)

4. Yasushi Takatori (85 out of 85 patents)

5. Koichi Ishihara (71 out of 72 patents)

6. Dai Ikarashi (67 out of 70 patents)

7. Tomoki Murakami (64 out of 68 patents)

8. Yutaka Miyamoto (63 out of 65 patents)

9. Atsushi Shimizu (59 out of 127 patents)

10. Hideyuki Nosaka (57 out of 57 patents)

11. Masato Mizoguchi (57 out of 58 patents)

12. Toshikazu Hashimoto (56 out of 60 patents)

13. Koki Hamada (54 out of 64 patents)

14. Hirantha Abeysekera (53 out of 53 patents)

15. Yoshiaki Kisaka (53 out of 55 patents)

5,289 patents: Sort by Forward Citations

1. 12468804 - Data classification device, data classification method, and data classification program (2025-11-11),

2. 12450481 - Distributed processing computer and distributed deep learning system (2025-10-21),

3. 12431158 - Speech signal processing device, speech signal processing method, speech signal processing program, training device, training method, and training program (2025-09-30),

4. 12431151 - Coding device, decoding device, and method and program thereof (2025-09-30),

5. 12430519 - Data processing device, data processing method, and data processing program (2025-09-30),

6. 12430510 - Text generation apparatus, text generation learning apparatus, text generation method, text generation learning method and program (2025-09-30),

7. 12428175 - Storage device, unmanned aerial vehicle, and system (2025-09-30),

8. 12425279 - Connecting circuit and communication interface (2025-09-23),

9. 12425105 - Optical burst transmitter (2025-09-23),

10. 12424237 - Tag estimation device, tag estimation method, and program (2025-09-23),

11. 12424233 - Target source signal generation apparatus, target source signal generation method, and program (2025-09-23),

12. 12424227 - Sound signal refinement method, sound signal decode method, apparatus thereof, program, and storage medium (2025-09-23),

13. 12423915 - Distribution control system, distribution control apparatus, distribution control method, and program (2025-09-23),

14. 12423608 - Computing device of Ising model (2025-09-23),

15. 12423327 - Information processing apparatus, information processing method and program for anonymizing data (2025-09-23),

Nippon Telegraph and Telephone Corporation (NTT) is a Japanese telecommunications company. It is one of the largest telecom companies in the world, providing a wide range of services including fixed-line, mobile, internet, and data services. NTT operates both domestically in Japan and internationally, delivering reliable and cutting-edge communication solutions. With a rich history spanning over 100 years, NTT continuously innovates and contributes to the advancement of information and communication technology.

This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 2 2025

5,289 Patents

#23 in Tokyo

#45 in Japan

#160 in the World

Nippon Telegraph and Telephone Corporation

Forward Citations = 44,627

4,846 inventors:

Takehiro Moriya (138 out of 142 patents)

Yutaka Kamamoto (119 out of 123 patents)

Noboru Harada (98 out of 98 patents)

4. Yasushi Takatori (85 out of 85 patents)

5. Koichi Ishihara (71 out of 72 patents)

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