EPO Patents = 4

Trademarks = 6

Forward Citations = 7

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9 inventors (with patents filed for the assignee):

Hak-Jae Kim (5 out of 7 patents)

Han-Shin Jung (5 out of 5 patents)

Ji Eun Lee (2 out of 62 patents)

4. Hakjae Kim (1 out of 26 patents)

5. Han Min Jung (1 out of 28 patents)

6. Byoung-Whoo Min (1 out of 1 patent)

7. Sun-Hyung Lee (1 out of 1 patent)

8. Chung Kyung Kim (1 out of 1 patent)

9. Hak Jae Kim (1 out of 4 patents)

10. Han Shin Jung (0 patent)

9 patents: Sort by Forward Citations

1. D813311 - Highlighter (2018-03-20),

2. 9228162 - Transparency solid cleaning agent (2016-01-05),

3. 9109298 - Crystal growing ornament (2015-08-18),

4. 9074068 - Bar type clay member for craft (2015-07-07),

5. 9068079 - Bar type clay for craft (2015-06-30),

6. 8500353 - Draw-out type solid marker (2013-08-06),

7. 8425675 - Recrystallization type of ink composition (2013-04-23),

8. 7682437 - Transparent solid marker (2010-03-23),

9. 6612765 - Core guide assembly for stationery article (2003-09-02),

Dong-a Teaching Materials Co., Ltd. is a leading educational resources provider based in South Korea. With over 40 years of experience in the industry, we specialize in producing high-quality teaching materials for language education, including textbooks, workbooks, and digital resources. Our products are widely used in schools and language institutes around the world, helping students of all ages learn and improve their language skills. Visit our website to learn more about our products and services.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

9 Patents

#68 in Daejeon

#1,131 in South Korea

Daejeon, South Korea

Dong-a Teaching Materials Co., Ltd.