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For the Inventor, By the Inventor

Kyoto, Japan

Dai-Ichi Seiko Co., Ltd.


USPTO Granted Patents = 327

% Expired Patents = 38.2



Trademarks = 17

Forward Citations = 2,124

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116 inventors (with patents filed for the assignee):

goldMedal Takayoshi Endo (108 out of 264 patents)

silverMedal Sakai Yagi (52 out of 147 patents)

bronzeMedal 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 25 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 Connector
Torque Sensor
Vibration Device
Connector Device
Electrical Cable Connector
Press-Fit Terminal
Movable Reflective Device
Ultrasonic Sensor
Bone Conduction Device
Speaker System
Coaxial Cable Connector
Digital Speaker

327 patents:

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.

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USPTO Data Jan 1 1976 - Sep 8 2026

Dai-Ichi Seiko Co., Ltd.
327 Patents

#23 in Kyoto 615-0031

#509 in Japan

#2,754 in the World

Kyoto, JP
Kyoto, Japan

Dai-Ichi Seiko Co., Ltd.

Forward Citations = 2,124

116 inventors:

goldMedal Takayoshi Endo (108 out of 264 patents)

silverMedal Sakai Yagi (52 out of 147 patents)

bronzeMedal Takuya Takeda (28 out of 28 patents)

4.  Kosuke Ozeki (21 out of 28 patents)

5.  Jun Mukunoki (21 out of 21 patents)

Please report any incorrect information to [email protected]
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