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For the Inventor, By the Inventor

Tokyo, Japan

Kddi Submarine Cable Systems Inc.


USPTO Granted Patents = 9

% Expired Patents = 66.7


Forward Citations = 41

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23 inventors (with patents filed for the assignee):

goldMedal Koji Goto (4 out of 26 patents)

silverMedal Takashi Mizuochi (4 out of 46 patents)

bronzeMedal Masatoshi Suzuki (4 out of 82 patents)

4.  Toshio Kawazawa (4 out of 13 patents)

5.  Hideki Goto (3 out of 32 patents)

6.  Yukio Horiuchi (3 out of 27 patents)

7.  Kenkichi Shimomura (3 out of 7 patents)

8.  Yasunori Kasahara (3 out of 8 patents)

9.  Daishi Ishii (3 out of 4 patents)

10.  Hidenori Taga (2 out of 42 patents)

11.  Takanori Inoue (1 out of 33 patents)

12.  Keiji Tanaka (1 out of 102 patents)

13.  Katsuhiro Shimizu (1 out of 37 patents)

14.  Shigeo Yamanaka (1 out of 4 patents)

15.  Hidenori Takahashi (1 out of 18 patents)


9 patents:

1. 7236703 - Optical wavelength division multiplexing device (2007-06-26),
2. 7177540 - Method for upgrading an optical transmission system and an optical transmitter (2007-02-13),
3. 7158728 - Optical repeating system and optical amplifying repeater control method (2007-01-02),
4. 7130544 - Optical repeating system and optical amplifying repeater control method (2006-10-31),
5. 7009693 - Gain profile measuring method and system and gain profile controlling method and system (2006-03-07),
6. 6914718 - Optical repeating system and optical amplifying repeater control method (2005-07-05),
7. 6754420 - Optical fiber transmission line (2004-06-22),
8. 6731836 - Dispersion compensator (2004-05-04),
9. 6584255 - Method for manufacturing optical fiber cable with optical fibers whose chromatic dispersion value are uniformed (2003-06-24),
Company Overview
Kddi Submarine Cable Systems Inc. is a leading global submarine cable system operator, providing reliable and secure telecommunications infrastructure for global data communication. With a strong focus on innovation and customer satisfaction, Kddi Submarine Cable Systems Inc. offers high-speed connectivity solutions to meet the growing demands of today's digital world.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

9 Patents

#2,020 in Tokyo

#4,699 in Japan

Tokyo, JP
Tokyo, Japan

Kddi Submarine Cable Systems Inc.

Forward Citations = 41

23 inventors:

goldMedal Koji Goto (4 out of 26 patents)

silverMedal Takashi Mizuochi (4 out of 46 patents)

bronzeMedal Masatoshi Suzuki (4 out of 82 patents)

4.  Toshio Kawazawa (4 out of 13 patents)

5.  Hideki Goto (3 out of 32 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Kddi Submarine Cable Systems Inc.. Retrieved from https://idiyas.com/company/kddi-submarine-cable-systems

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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