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For the Inventor, By the Inventor

Seoul, South Korea

Pt Plus Co., Ltd.


USPTO Granted Patents = 3

% Expired Patents = 66.7

Forward Citations = 50

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2 inventors (with patents filed for the assignee):

goldMedal Seung Ki Joo (3 out of 15 patents)

silverMedal Seok Woon Lee (3 out of 3 patents)


3 patents:

1. 6692996 - Method for crystallizing silicon layer (2004-02-17),
2. 6596573 - Thin film transistor including polycrystalline active layer and method for fabricating the same (2003-07-22),
3. 6548331 - Method for fabricating thin film transistor including crystalline silicon active layer (2003-04-15),
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USPTO Data Jan 1 1976 - Oct 6 2026

3 Patents

#965 in Seoul

#2,789 in South Korea

Seoul, KR
Seoul, South Korea

Pt Plus Co., Ltd.

Forward Citations = 50

2 inventors:

goldMedal Seung Ki Joo (3 out of 15 patents)

silverMedal Seok Woon Lee (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Pt Plus Co., Ltd.. Retrieved from https://idiyas.com/company/pt-plus-company

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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