For the Inventor, By the Inventor

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Seoul, South Korea

Beadtech Inc.

USPTO Granted Patents = 3

% Expired Patents = 66.7

Forward Citations = 1

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6 inventors (with patents filed for the assignee):

Tae-Kyung Lee (2 out of 5 patents)

Sun-Jong Ryoo (2 out of 2 patents)

Yoon-Sik Lee (1 out of 9 patents)

4. Ju-Han Kim (1 out of 1 patent)

5. Yoon Sik Lee (1 out of 1 patent)

6. Sun Jong Ryoo (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 7442745 - Aminomethyl polystyrene resin and preparation process for the same (2008-10-28),

2. 6875822 - Process for preparing tritylated polystyrene resin (2005-04-05),

3. 6369169 - Modified polystyrene spherical, resin and process for decontaminating waste water by using the same (2002-04-09),

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USPTO Data Jan 1 1976 - Oct 6 2026

3 Patents

#965 in Seoul

#2,789 in South Korea

Seoul, South Korea

Beadtech Inc.

Forward Citations = 1

6 inventors:

Tae-Kyung Lee (2 out of 5 patents)

Sun-Jong Ryoo (2 out of 2 patents)

Yoon-Sik Lee (1 out of 9 patents)

4. Ju-Han Kim (1 out of 1 patent)

5. Yoon Sik Lee (1 out of 1 patent)

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