For the Inventor, By the Inventor

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Shiheung, Kyungki-do, South Korea

Heesung Engelhard Corporation

USPTO Granted Patents = 2

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. Young-San Yoo (0 patent)

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),

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USPTO Data Jan 1 1976 - Dec 30 2025

2 Patents

#1 in Shiheung, Kyungki-do

#10,508 in South Korea

Shiheung, Kyungki-do, 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)

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