EPO Patents = 3

Forward Citations = 4

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8 inventors (with patents filed for the assignee):

Hyun-Sik Han (2 out of 5 patents)

Eun-Seok Kim (1 out of 11 patents)

Gon Seo (1 out of 2 patents)

4. Tae-Woo Lee (1 out of 2 patents)

5. Hee Chun Kang (1 out of 1 patent)

6. Tae Hun Yeon (1 out of 1 patent)

7. Young-San Yoo (1 out of 1 patent)

8. Gi-Won Park (1 out of 1 patent)

9. Jae-Uk Han (3 patents)

10. Jae-Ho Bae (2 patents)

11. Jae-Au Ha (0 patent)

12. Jin-Woo Song (0 patent)

2 patents: Sort by Forward Citations

1. 7895825 - Method and apparatus for reducing exhaust gas including hydrocarbons during initial cold start period (2011-03-01),

2. 7740818 - Transition metal-substituted hydrotalcite catalyst for removing nitrogen oxides from the exhaust gas of diesel engine by storage-reduction (2010-06-22),

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

2 Patents

#19 in Siheung

#3,796 in South Korea

Siheung, South Korea

Heesung Engelhard Corporation

Forward Citations = 4

8 inventors:

Hyun-Sik Han (2 out of 5 patents)

Eun-Seok Kim (1 out of 11 patents)

Gon Seo (1 out of 2 patents)

4. Tae-Woo Lee (1 out of 2 patents)

5. Hee Chun Kang (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Heesung Engelhard Corporation. Retrieved from https://idiyas.com/company/heesung-engelhard

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]

3 patents (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]