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Dai-ichi Seiko Co., Ltd.

USPTO Granted Patents = 327

CIPO Patents = 1

EPO Patents = 60

Trademarks = 26

Forward Citations = 2,005

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120 inventors (with patents filed for the assignee):

Takayoshi Endo (108 out of 264 patents)

Sakai Yagi (52 out of 147 patents)

Takuya Takeda (28 out of 28 patents)

4. Kosuke Ozeki (21 out of 28 patents)

5. Jun Mukunoki (21 out of 21 patents)

6. Kenji Ogata (17 out of 23 patents)

7. Takeshi Hirakawa (17 out of 21 patents)

8. Shuji Touno (17 out of 17 patents)

9. Masao Ishimaru (14 out of 14 patents)

10. Koji Hanaki (14 out of 14 patents)

11. Masaya Muta (13 out of 13 patents)

12. Shunya Oohashi (13 out of 13 patents)

13. Daisuke Matsushita (12 out of 13 patents)

14. Yoichi Hashimoto (11 out of 20 patents)

15. Masatoshi Takemoto (11 out of 11 patents)

Core Competencies:

Electrical Connectors

Torque Sensors

Ultrasonic Sensors

Bone Conduction Devices

Movable Reflective Devices

Vibration Devices

Speaker Systems

Press-Fit Terminals

Circuit Board Connecting Devices

Electrical Cable Connectors

Connection Jigs

Substance Detecting Elements

327 patents: Sort by Forward Citations

1. 12413022 - Electrical connector and connector device (2025-09-09),

2. 11577403 - Position correction device, robot, and connection jig (2023-02-14),

3. 11569620 - Electrical connector and connector device (2023-01-31),

4. 11448619 - Substance detecting element (2022-09-20),

5. 11374362 - Electrical connector (2022-06-28),

6. 11360300 - Movable reflective device (2022-06-14),

7. 11284196 - Vibration device (2022-03-22),

8. 11187600 - Torque sensor (2021-11-30),

9. D936612 - Electrical connector cover (2021-11-23),

10. 11146001 - Press-fit terminal and method for manufacturing press-fit terminal (2021-10-12),

11. 11067541 - Ultrasonic sensor (2021-07-20),

12. 10985504 - Electrical connector and connector device (2021-04-20),

13. D913967 - Electrical connector cover (2021-03-23),

14. 10951965 - Bone conduction device (2021-03-16),

15. 10923858 - Electrical connector (2021-02-16),

DAI-ICHI SEIKO CO., LTD. is a leading manufacturing company specialized in the production of high precision machining components and equipment accessories. With over 50 years of experience, we have established ourselves as a trusted partner for diverse industries worldwide. Our commitment to quality, innovation, and customer satisfaction has made us a preferred choice in the market. Visit our website for more information.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

327 Patents

#19 in Kyoto 615-0031

#490 in Japan

#2,676 in the World

Dai-ichi Seiko Co., Ltd.

Forward Citations = 2,005

120 inventors:

Takayoshi Endo (108 out of 264 patents)

Sakai Yagi (52 out of 147 patents)

Takuya Takeda (28 out of 28 patents)

4. Kosuke Ozeki (21 out of 28 patents)

5. Jun Mukunoki (21 out of 21 patents)

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