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For the Inventor, By the Inventor

Tokyo, Japan

Kddi Corporation


USPTO Granted Patents = 448



Trademarks = 13

Forward Citations = 1,413

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397 inventors (with patents filed for the assignee):

goldMedal Kei Kawamura (39 out of 40 patents)

silverMedal Sei Naito (39 out of 45 patents)

bronzeMedal Takeo Ohseki (29 out of 31 patents)

4.  Kyohei Unno (25 out of 25 patents)

5.  Toshiaki Yamamoto (22 out of 28 patents)

6.  Shigeyuki Sakazawa (22 out of 33 patents)

7.  Satoshi Konishi (20 out of 29 patents)

8.  Yasuhiro Suegara (17 out of 17 patents)

9.  Keisuke Takemori (17 out of 18 patents)

10.  Atsushi Koike (17 out of 60 patents)

11.  Yasuhiro Takishima (17 out of 29 patents)

12.  Toshinori Suzuki (16 out of 39 patents)

13.  Ryoichi Kawada (16 out of 23 patents)

14.  Akira Idoue (14 out of 18 patents)

15.  Tomoaki Matsuki (13 out of 13 patents)


Core Competencies:
Image Decoding
Point Cloud Decoding
Communication Efficiency
Massive MIMO
Wireless Communication
Relay Communication
Flight Management
Information Processing
Signal Transmission Control
Random Access Procedure
Video Stream Generation
Radio Resource Scheduling

448 patents:

1. 12519951 - Image decoding device, image decoding method, and program (2026-01-06),
2. 12518429 - Point-cloud decoding device, point-cloud decoding method, and program (2026-01-06),
3. 12513581 - Relay apparatus, communication apparatus, control method, and computer-readable storage medium for executing handover processing of relay apparatus (2025-12-30),
4. 12511792 - Point cloud decoding device, point cloud decoding method, and program (2025-12-30),
5. 12506316 - Optical coupler and optical amplifier (2025-12-23),
6. 12501054 - Image decoding device, image decoding method, and program (2025-12-16),
7. 12477148 - Image decoding device, image decoding method, and program (2025-11-18),
8. 12464569 - Terminal apparatus, and control method for performing handover having enhanced communication efficiency (2025-11-04),
9. 12451946 - Control device that improves communication efficiency in cell-free massive MIMO system composed of many antennas, control method of the same, processing device, processing method of the same, and computer-readable storage medium (2025-10-21),
10. 12444309 - Information processing apparatus and information processing method (2025-10-14),
11. 12439079 - Image decoding device, image decoding method, and program (2025-10-07),
12. 12423875 - Point-cloud decoding device, point-cloud decoding method, and program (2025-09-23),
13. 12417708 - Flight management apparatus and flight management method (2025-09-16),
14. 12408113 - Communication device, control method and computer-readable storage medium for executing transmission power control in relay transmission (2025-09-02),
15. 12408012 - Wireless communication device, communication control method, and computer program (2025-09-02),
KDDI Corporation is a telecommunications company based in Japan. It offers a wide range of telecommunications services, including mobile, fixed-line, internet, and data centers. With a strong focus on innovation and customer satisfaction, KDDI strives to provide cutting-edge technology solutions and reliable communications infrastructure to businesses and individuals. Visit their website for more information.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Jan 13 2026

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448 Patents

#179 in Tokyo

#397 in Japan

#2,061 in the World

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Tokyo, Japan

Kddi Corporation

Forward Citations = 1,413

397 inventors:

goldMedal Kei Kawamura (39 out of 40 patents)

silverMedal Sei Naito (39 out of 45 patents)

bronzeMedal Takeo Ohseki (29 out of 31 patents)

4.  Kyohei Unno (25 out of 25 patents)

5.  Toshiaki Yamamoto (22 out of 28 patents)

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