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For the Inventor, By the Inventor

Daejeon, South Korea

Dong-A Teaching Materials Co., Ltd.

Calculating rank
USPTO Granted Patents = 9


Trademarks = 5

Forward Citations = 9

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9 inventors (with patents filed for the assignee):

goldMedal Hak-Jae Kim (5 out of 7 patents)

silverMedal Han-Shin Jung (5 out of 5 patents)

bronzeMedal Ji Eun Lee (2 out of 67 patents)

4.  Hakjae Kim (1 out of 27 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:

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),
Company Overview
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.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

9 Patents

#76 in Daejeon

#1,189 in South Korea

Daejeon, KR
Daejeon, South Korea

Dong-A Teaching Materials Co., Ltd.

Forward Citations = 9

9 inventors:

goldMedal Hak-Jae Kim (5 out of 7 patents)

silverMedal Han-Shin Jung (5 out of 5 patents)

bronzeMedal Ji Eun Lee (2 out of 67 patents)

4.  Hakjae Kim (1 out of 27 patents)

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

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Dong-A Teaching Materials Co., Ltd.. Retrieved from https://idiyas.com/company/dong-a-teaching-materials-company

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

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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