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Kokusai Denshin Denwa Co., Ltd.

USPTO Granted Patents = 226

CIPO Patents = 2

Forward Citations = 5,520

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299 inventors (with patents filed for the assignee):

Yoshinao Iwamoto (13 out of 20 patents)

Hiroharu Wakabayashi (11 out of 23 patents)

Hideo Kobayashi (9 out of 194 patents)

4. Masahiro Wada (9 out of 48 patents)

5. Shu Yamamoto (9 out of 75 patents)

6. Hiroyasu Ishikawa (8 out of 20 patents)

7. Hideyuki Shinonaga (8 out of 19 patents)

8. Yoshikazu Ikeda (8 out of 11 patents)

9. Kenichi Asakawa (8 out of 13 patents)

10. Katsuyuki Yamazaki (7 out of 48 patents)

11. Toshio Mizuno (7 out of 25 patents)

12. Yasuhiro Takishima (7 out of 29 patents)

13. Masanobu Fujioka (7 out of 15 patents)

14. Yoshio Takeuchi (7 out of 21 patents)

15. Yoshinori Hatori (7 out of 17 patents)

Core Competencies:

Network Interworking

Video Signal Coding

Routing Control Communication

Traffic Monitoring

Spread Spectrum Communication

VPN Construction

Speech Recognition

Neural Networks

Optical Amplifier

Authentication Systems

Image Analysis

Data Scramble Transmission

226 patents: Sort by Forward Citations

1. 6975624 - Network interworking device for LAN/internet (2005-12-13),

2. 6856650 - Method and apparatus for second or later generation coding of video signal (2005-02-15),

3. 6456617 - Routing control communication system between circuit switched network and internet (2002-09-24),

4. 6324166 - Call setup control apparatus in ATM switch (2001-11-27),

5. 6239834 - Apparatus for evaluating digital picture quality (2001-05-29),

6. 6178450 - Method and apparatus for monitoring a communication link based on TCP/IP protocol by emulating behavior of the TCP protocol (2001-01-23),

7. 6154506 - Timing recovery and tracking method and apparatus for data signals (2000-11-28),

8. 6147974 - Apparatus for monitoring state of traffic in telecommunication network (2000-11-14),

9. 6108380 - Method and apparatus for deciding optimum orthogonal transform mode (2000-08-22),

10. 6107961 - Map display system (2000-08-22),

11. 6104746 - Spread spectrum communication system (2000-08-15),

12. 6092113 - Method for constructing a VPN having an assured bandwidth (2000-07-18),

13. 6081838 - Method for access control on MIB in OSI management (2000-06-27),

14. 6078913 - Document retrieval apparatus (2000-06-20),

15. 6076164 - Authentication method and system using IC card (2000-06-13),

Kokusai Denshin Denwa Co., Ltd. (KDDI) is a leading telecommunications company based in Japan. With a focus on providing innovative and reliable services, KDDI offers a wide range of solutions for businesses, individuals, and governments. Their expertise includes mobile communication, fixed-line telephony, internet connectivity, data centers, and cloud computing. KDDI is committed to delivering high-quality services that enhance productivity and foster digital transformation.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

226 Patents

#280 in Tokyo

#630 in Japan

#3,670 in the World

Kokusai Denshin Denwa Co., Ltd.

Forward Citations = 5,520

299 inventors:

Yoshinao Iwamoto (13 out of 20 patents)

Hiroharu Wakabayashi (11 out of 23 patents)

Hideo Kobayashi (9 out of 194 patents)

4. Masahiro Wada (9 out of 48 patents)

5. Shu Yamamoto (9 out of 75 patents)

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