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For the Inventor, By the Inventor

Gyeonggi-do, South Korea

Dong Yang Piston Co., Ltd.

Calculating rank
USPTO Granted Patents = 8

% Expired Patents = 12.5


Forward Citations = 2

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32 inventors (with patents filed for the assignee):

goldMedal Kwan Ho Ryu (5 out of 5 patents)

silverMedal Jun Kui Yang (4 out of 4 patents)

bronzeMedal Sang Hyuk Jun (3 out of 3 patents)

4.  Jeong Keon Lee (3 out of 3 patents)

5.  Woo Seok Shim (2 out of 2 patents)

6.  Jang Ik Park (2 out of 2 patents)

7.  Jun-Kui Yang (2 out of 2 patents)

8.  Kwan-Ho Ryu (2 out of 2 patents)

9.  Jeong-Keun Lee (2 out of 2 patents)

10.  Sang-Bean Park (2 out of 2 patents)

11.  Lee Cheol Ji (2 out of 2 patents)

12.  In Cheol Yoo (2 out of 2 patents)

13.  Sang Shin Lee (1 out of 111 patents)

14.  Duck Whan Kim (1 out of 34 patents)

15.  Young Bum Kum (1 out of 33 patents)


8 patents:

1. 12238903 - Water-cooled heat dissipation module assembly (2025-02-25),
2. 11014201 - Laser welding apparatus (2021-05-25),
3. 10760526 - Piston for internal combustion engine (2020-09-01),
4. 10724466 - Piston for vehicle engine and method for manufacturing the same (2020-07-28),
5. 10682686 - Eco-mold apparatus for manufacturing piston, mold apparatus for manufacturing piston, and piston manufacturing method (2020-06-16),
6. 10100777 - Piston for internal combustion engine, and cooling channel core (2018-10-16),
7. 10060327 - Piston for internal combustion engine, and cooling channel core (2018-08-28),
8. 9328823 - Steel piston having cooling channel without flash (2016-05-03),
Company Overview
Dong Yang Piston Co., Ltd. is a leading manufacturer of pistons for automotive and industrial applications. Established in 1974, the company has grown to become a trusted supplier with a strong reputation for quality and reliability. With state-of-the-art facilities and a commitment to innovation, Dong Yang Piston Co., Ltd. continues to provide high-quality products to customers worldwide.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

8 Patents

#89 in Gyeonggi-do

#1,307 in South Korea

Gyeonggi-do, KR
Gyeonggi-do, South Korea

Dong Yang Piston Co., Ltd.

Forward Citations = 2

32 inventors:

goldMedal Kwan Ho Ryu (5 out of 5 patents)

silverMedal Jun Kui Yang (4 out of 4 patents)

bronzeMedal Sang Hyuk Jun (3 out of 3 patents)

4.  Jeong Keon Lee (3 out of 3 patents)

5.  Woo Seok Shim (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Dong Yang Piston Co., Ltd.. Retrieved from https://idiyas.com/company/dong-yang-piston-company

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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