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For the Inventor, By the Inventor

Kawasaki, Japan

Igarashi Electric Works Ltd.


USPTO Granted Patents = 11

% Expired Patents = 81.8


Trademarks = 1

Forward Citations = 27

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13 inventors (with patents filed for the assignee):

goldMedal Yusuke Mizukoshi (5 out of 5 patents)

silverMedal Yoshihisa Watanabe (4 out of 18 patents)

bronzeMedal Naoto Sesita (4 out of 4 patents)

4.  Katuyuki Tanaka (4 out of 4 patents)

5.  Hiroyuki Kurihara (4 out of 4 patents)

6.  Junichi Tada (3 out of 12 patents)

7.  Naoto Seshita (2 out of 2 patents)

8.  Ryo Nazawa (1 out of 1 patent)

9.  Hiroshi Sato (1 out of 17 patents)

10.  Kazuhito Yokomori (1 out of 43 patents)

11.  Koichi Kobayashi (1 out of 1 patent)

12.  Yoshinori Yamauchi (1 out of 1 patent)

13.  Shigetaka Oki (1 out of 1 patent)

14.  Kazuhito c/o Nirasaki Factory Yokomori (0 patent)

15.  Hiroyuki Kuhihara (0 patent)


11 patents:

1. 10879820 - Control device for brushless DC servo motor (2020-12-29),
2. 10742087 - Motor apparatus with waterproof cover for vehicle (2020-08-11),
3. 10308230 - Electric parking brake device (2019-06-04),
4. 10295374 - Rotation angle detecting device and an electric motor provided with the rotation angle detecting device (2019-05-21),
5. 7573171 - Rotation control motor (2009-08-11),
6. 7511396 - Moving material electric control device (2009-03-31),
7. 7478574 - Electric actuator (2009-01-20),
8. 7339299 - Electric actuator and motor used therein (2008-03-04),
9. 7073947 - Bearing structure of a motor (2006-07-11),
10. 6909214 - Motor-contained electric actuator (2005-06-21),
11. 6285106 - Commutator (2001-09-04),
Company Overview
Igarashi Electric Works Ltd. is a prominent Japanese company specializing in the development and manufacturing of precision motors and related components. The organization focuses on innovative solutions for various applications, including automotive, industrial, and consumer electronics. With a commitment to advancing technology, Igarashi Electric Works engages in research and development to enhance the efficiency and performance of its products, contributing to the evolution of electric motor technology on a global scale.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

11 Patents

#54 in Kawasaki

#4,137 in Japan

#51,761 in the World

Kawasaki, JP
Kawasaki, Japan

Igarashi Electric Works Ltd.

Forward Citations = 27

13 inventors:

goldMedal Yusuke Mizukoshi (5 out of 5 patents)

silverMedal Yoshihisa Watanabe (4 out of 18 patents)

bronzeMedal Naoto Sesita (4 out of 4 patents)

4.  Katuyuki Tanaka (4 out of 4 patents)

5.  Hiroyuki Kurihara (4 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Igarashi Electric Works Ltd.. Retrieved from https://idiyas.com/company/igarashi-electric-works

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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