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Koriyama, Japan

Hitachi Telecom Technologies, Ltd

USPTO Granted Patents = 61

% Expired Patents = 18.0

Forward Citations = 202

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71 inventors (with patents filed for the assignee):

Tatsuo Yamauchi (9 out of 9 patents)

Kimitoshi Takeuchi (8 out of 8 patents)

Kazumasa Azuma (6 out of 8 patents)

4. Sakae Watanabe (6 out of 6 patents)

5. Ikuo Aso (6 out of 6 patents)

6. Kazuo Sanpei (6 out of 6 patents)

7. Shinya Suzuki (5 out of 6 patents)

8. Toru Yoshihara (5 out of 6 patents)

9. Fumiyoshi Oono (5 out of 5 patents)

10. Tomonobu Watanabe (5 out of 5 patents)

11. Makoto Oohashi (4 out of 4 patents)

12. Toshie Takahashi (4 out of 4 patents)

13. Kaoru Suzuki (4 out of 4 patents)

14. Yoshihisa Domoto (4 out of 4 patents)

15. Junichi Tanji (4 out of 4 patents)

Core Competencies:

DTMF Transmission

Packet Data Processing

Communication Systems

ATM Equipment

Multiplexing

Line Switching

Speech Systems

Digital Telephone

Dealing Communication

ISDN Circuits

Remote Trading

Electric Appliances

61 patents: Sort by Forward Citations

1. 7532606 - DTMF signal transmission method and communication apparatus (2009-05-12),

2. 7120171 - Packet data processing apparatus and packet data processing method (2006-10-10),

3. 7103036 - Voice data relay apparatus (2006-09-05),

4. 7099456 - Call center system (2006-08-29),

5. 7062033 - DTMF signal transmission method and communication apparatus (2006-06-13),

6. 7058060 - ATM apparatus, IP apparatus and bus system (2006-06-06),

7. 7050570 - DTMF signal transmission method and communication apparatus (2006-05-23),

8. 7050438 - Cell creation method for control line signals of ATM Network and multiplexing equipment (2006-05-23),

9. 7035265 - Multiplexer and priority control method for packet data transmissions (2006-04-25),

10. 6970460 - Multiplexing apparatus (2005-11-29),

11. 6912220 - ATM equipment (2005-06-28),

12. 6898178 - ATM device, subscriber system, communication system and backup method (2005-05-24),

13. 6892232 - Local networking system for registering unregistered terminals (2005-05-10),

14. 6862290 - Line switching system and line switching unit of dynamic band variation unit (2005-03-01),

15. 6836545 - Communication system, exchange and communication holding control method (2004-12-28),

Hitachi Telecom Technologies, Ltd specializes in providing advanced telecommunications solutions. They offer a wide range of products and services including network infrastructure systems, optical transmission systems, and advanced network management software. With their innovative technologies, Hitachi Telecom Technologies aims to enhance communication networks and contribute to the development of the telecommunications industry.

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

Company Badge

USPTO Data Jan 1 1976 - Sep 15 2026

Hitachi Telecom Technologies, Ltd

61 Patents

#1 in Koriyama

#1,510 in Japan

#11,905 in the World

Koriyama, Japan

Hitachi Telecom Technologies, Ltd

Forward Citations = 202

71 inventors:

Tatsuo Yamauchi (9 out of 9 patents)

Kimitoshi Takeuchi (8 out of 8 patents)

Kazumasa Azuma (6 out of 8 patents)

4. Sakae Watanabe (6 out of 6 patents)

5. Ikuo Aso (6 out of 6 patents)

Please report any incorrect information to [email protected]

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