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Nippon Telegraph and Telephone Public Corporation

USPTO Granted Patents = 522

Forward Citations = 11,771

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1,092 inventors (with patents filed for the assignee):

Rikuo Takano (15 out of 16 patents)

Takao Edahiro (14 out of 15 patents)

Masahiko Aiba (13 out of 45 patents)

4. Yuji Sumitomo (12 out of 18 patents)

5. Yoshihiko Mizushima (11 out of 12 patents)

6. Yoichi Yamamoto (9 out of 32 patents)

7. Nobuo Inagaki (9 out of 10 patents)

8. Atsushi Iwata (8 out of 9 patents)

9. Seitaro Matsuo (8 out of 8 patents)

10. Motohiro Nakahara (7 out of 16 patents)

11. Isao Fujimoto (7 out of 9 patents)

12. Minoru Watanabe (6 out of 199 patents)

13. Masao Kawachi (6 out of 21 patents)

14. Gotaro Tanaka (6 out of 30 patents)

15. Tetsushi Sakai (6 out of 6 patents)

Core Competencies:

Encryption Evaluation

Solid Oxide Fuel Cell

Optical Fiber Connector

Photomask Inspection

Bipolar Transistors

Speech Signal Processing

Wireless Transmission Systems

Optical Fiber Production

Dynamic RAM Cells

Antenna Design

Mass Spectrometry

Optical Fiber Testing

522 patents: Sort by Forward Citations

1. 7187769 - Method and apparatus for evaluating the strength of an encryption (2007-03-06),

2. 7180341 - Variable division method and variable divider (2007-02-20),

3. 5786105 - Solid oxide fuel cell (1998-07-28),

4. 5661560 - Elliptical light measuring method (1997-08-26),

5. 5548401 - Photomask inspecting method and apparatus (1996-08-20),

6. 5379361 - Optical fiber connector including L-shaped positioning standard surfaces (1995-01-03),

7. 5280469 - System for monitoring normality of operation of ATM cross-connecting (1994-01-18),

8. 5097204 - Method and apparatus for evaluating the capacitance of an integrated (1992-03-17),

9. 5006795 - Charged beam radiation apparatus (1991-04-09),

10. 4980639 - Method and apparatus for testing integrated electronic device (1990-12-25),

11. 4975102 - Optical transmission fiber and process for producing the same (1990-12-04),

12. 4966434 - Optical fiber cable (1990-10-30),

13. 4920401 - Bipolar transistors (1990-04-24),

14. 4905143 - Array processor and control method thereof (1990-02-27),

15. 4878933 - Apparatus for fusion splicing optical fibers (1989-11-07),

Nippon Telegraph and Telephone Public Corporation (NTT) is a leading Japanese telecommunications company. It provides a wide range of services including fixed-line and mobile phone services, internet and data communication solutions, and IT consulting. With a strong focus on innovation and technological advancement, NTT strives to connect people, businesses, and society through advanced communication technologies. For more information, please visit their official website.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

522 Patents

#11 in

#364 in Japan

#1,813 in the World

Nippon Telegraph and Telephone Public Corporation

Forward Citations = 11,771

1,092 inventors:

Rikuo Takano (15 out of 16 patents)

Takao Edahiro (14 out of 15 patents)

Masahiko Aiba (13 out of 45 patents)

4. Yuji Sumitomo (12 out of 18 patents)

5. Yoshihiko Mizushima (11 out of 12 patents)

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