For the Inventor, By the Inventor

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Seoul, South Korea

Ed-Tech Co., Ltd.

USPTO Granted Patents = 11

Trademarks = 1

Forward Citations = 258

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11 inventors (with patents filed for the assignee):

Edward M Schwartz (6 out of 6 patents)

Wilburn D Everman (5 out of 7 patents)

Chul-Ho Lim (4 out of 4 patents)

4. Dong-Il Han (2 out of 4 patents)

5. Han Sung Jung (1 out of 40 patents)

6. Je-Hoon Oh (1 out of 1 patent)

7. Suk-Kyu Kang (1 out of 1 patent)

8. Soo-Yen Lim (1 out of 1 patent)

9. Ji Hyun Lee (1 out of 51 patents)

10. Wilburn D Evrman (1 out of 1 patent)

11. Robert E Morgan (1 out of 1 patent)

11 patents: Sort by Forward Citations

1. 7428283 - Data recovery algorithm using data position detection and serial data receiver adopting the same (2008-09-23),

2. 7388998 - Apparatus and method for controlling brightness of moving image signals in real time (2008-06-17),

3. 7336315 - Apparatus and method for performing intra-field interpolation for de-interlacer (2008-02-26),

4. 6937258 - Flat panel display device (2005-08-30),

5. 6781581 - Apparatus for interfacing timing information in digital display device (2004-08-24),

6. 5083514 - Automatic vertically adjustable work surface (1992-01-28),

7. 5048784 - Adjustable inset bracket (1991-09-17),

8. 4987835 - Automatic vertically adjustable work surface (1991-01-29),

9. 4976407 - Adjustable wrist support (1990-12-11),

10. 4969403 - Automatic vertically adjustable work surface (1990-11-13),

11. 4881471 - Vertically adjustable, retrofittable workstation (1989-11-21),

Ed-tech Co., Ltd. is a leading provider of online educational services, offering a wide range of courses and resources to help students of all ages and levels achieve their academic goals. With a team of experienced educators and cutting-edge technology, we strive to make learning accessible, engaging, and effective for all learners.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Jan 20 2026

11 Patents

#321 in Seoul

#965 in South Korea

#50,356 in the World

Seoul, South Korea

Ed-Tech Co., Ltd.

Forward Citations = 258

11 inventors:

Edward M Schwartz (6 out of 6 patents)

Wilburn D Everman (5 out of 7 patents)

Chul-Ho Lim (4 out of 4 patents)

4. Dong-Il Han (2 out of 4 patents)

5. Han Sung Jung (1 out of 40 patents)

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