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For the Inventor, By the Inventor

Gyeonggi-do, South Korea

Do Qoom, Corp, Ltd.


USPTO Granted Patents = 3


Forward Citations = 2

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2 inventors (with patents filed for the assignee):

goldMedal Sang Heon Lee (3 out of 152 patents)

silverMedal Dong Il Han (1 out of 7 patents)


3 patents:

1. 12060949 - Assemblable check valve (2024-08-13),
2. 11143323 - Valve assembly (2021-10-12),
3. 10612676 - Check valve having reverse-direction fluid supply function (2020-04-07),
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USPTO Data Jan 1 1976 - Oct 6 2026

3 Patents

#191 in Gyeonggi-do

#2,789 in South Korea

Gyeonggi-do, KR
Gyeonggi-do, South Korea

Do Qoom, Corp, Ltd.

Forward Citations = 2

2 inventors:

goldMedal Sang Heon Lee (3 out of 152 patents)

silverMedal Dong Il Han (1 out of 7 patents)

Please report any incorrect information to [email protected]
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