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For the Inventor, By the Inventor

Gwangju, South Korea

Dooqoom, Corp., Ltd.


USPTO Granted Patents = 2

Forward Citations = 3

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1 inventor (with patents filed for the assignee):

goldMedal Sang Heon Lee (2 out of 143 patents)


2 patents:

1. D1019907 - Strainer (2024-03-26),
2. D1006961 - Hammerless check valve (2023-12-05),
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USPTO Data Jan 1 1976 - Dec 9 2025

2 Patents

#36 in Gwangju

#3,600 in South Korea

...
Gwangju, South Korea

Dooqoom, Corp., Ltd.

Forward Citations = 3

1 inventor:

goldMedal Sang Heon Lee (2 out of 143 patents)

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