% Expired Patents = 16.7

EPO Patents = 1

Forward Citations = 10

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24 inventors (with patents filed for the assignee):

Ho-Cheol Suh (2 out of 2 patents)

Jong-Ho Seon (2 out of 14 patents)

Ho-Chan An (2 out of 14 patents)

4. Hyung-Chul Noh (1 out of 1 patent)

5. Young-Mo Goo (1 out of 1 patent)

6. Myong-Hwan Kim (1 out of 1 patent)

7. Wan Cheol Lee (1 out of 1 patent)

8. Ki-Chul Park (1 out of 18 patents)

9. Ju-Hyuck Lee (1 out of 1 patent)

10. Hong-Jae Kim (1 out of 1 patent)

11. In-Sung Jung (1 out of 2 patents)

12. Seung-Hoon Chae (1 out of 1 patent)

13. Seok-Yun Jang (1 out of 1 patent)

14. Bong-Ki Kim (1 out of 1 patent)

15. Jae-Yeon Kim (1 out of 2 patents)

6 patents: Sort by Forward Citations

1. 10971739 - Common flow field type fuel cell separator, fuel cell separator assembly, and fuel cell stack (2021-04-06),

2. 10794299 - Variable exhaust valve assembly for vehicle (2020-10-06),

3. 10208639 - Structure of muffler (2019-02-19),

4. 10044143 - Multi-functional position holder and connector including same (2018-08-07),

5. 9617905 - Apparatus for exhaust heat recovery with embedded valve actuator (2017-04-11),

6. 9115619 - Thermoelectric generator of vehicle (2015-08-25),

Company Overview

Sejong Ind. Co., Ltd is a leading manufacturer of automotive parts and components, specializing in exhaust systems and catalytic converters. With over 30 years of experience, we are committed to providing high-quality solutions to our customers worldwide. Our advanced technology and expertise ensure superior performance and efficiency in every product we deliver.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

6 Patents

#28 in Ulsan

#1,619 in South Korea

Ulsan, South Korea

Sejong Ind. Co., Ltd

Forward Citations = 10

24 inventors:

Ho-Cheol Suh (2 out of 2 patents)

Jong-Ho Seon (2 out of 14 patents)

Ho-Chan An (2 out of 14 patents)

4. Hyung-Chul Noh (1 out of 1 patent)

5. Young-Mo Goo (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sejong Ind. Co., Ltd. Retrieved from https://idiyas.com/company/sejong-ind-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]

1 patent (EPO):

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]