For the Inventor, By the Inventor

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Seoul, South Korea

Dong-a Pencil Co., Ltd.

USPTO Granted Patents = 39

EPO Patents = 5

Trademarks = 15

Forward Citations = 397

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12 inventors (with patents filed for the assignee):

Hakjae Kim (14 out of 26 patents)

Jewon Kim (7 out of 7 patents)

Sung Ryul Hwang (6 out of 6 patents)

4. Chang Bong Yoon (6 out of 6 patents)

5. Hak Jae Kim (3 out of 4 patents)

6. Jung-gul An (1 out of 1 patent)

7. Je-Won Kim (1 out of 1 patent)

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

9. Kwang Taek Jeon (1 out of 1 patent)

10. Hak-Jae Kim (7 patents)

11. Myeong-Ki Kim (0 patent)

12. Myeong-Ki Kim (0 patent)

39 patents: Sort by Forward Citations

1. D1053946 - Ballpoint pen (2024-12-10),

2. D1046966 - Pen (2024-10-15),

3. D1039048 - Ballpoint pen (2024-08-13),

4. D996522 - Ballpoint pen (2023-08-22),

5. D974468 - Pen (2023-01-03),

6. 10639927 - Knock type pen (2020-05-05),

7. 10525761 - Knock type pen (2020-01-07),

8. 10377166 - Knock type pen (2019-08-13),

9. 10369836 - Knock type pen (2019-08-06),

10. 10017004 - Thermochromic writing instrument (2018-07-10),

11. D817400 - Ballpoint pen (2018-05-08),

12. D817399 - Ballpoint pen (2018-05-08),

13. 9909025 - Thermochromic micro particles and thermochromic ink composition, writing apparatus and smart window using the same (2018-03-06),

14. 9879147 - Thermochromic micro particles and thermochromic ink composition, writing apparatus and smart window using the same (2018-01-30),

15. D797853 - Ballpoint pen (2017-09-19),

Dong-a Pencil Co., Ltd. is a leading stationery manufacturer based in South Korea. Established in 1956, the company has been producing high-quality writing instruments, art supplies, and office accessories for over six decades. With a strong emphasis on innovation and design, Dong-a Pencil Co., Ltd. offers a wide range of products that cater to the needs of students, artists, and professionals worldwide.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 2 2025

39 Patents

#113 in Seoul

#362 in South Korea

#16,914 in the World

Seoul, South Korea

Dong-a Pencil Co., Ltd.

Forward Citations = 397

12 inventors:

Hakjae Kim (14 out of 26 patents)

Jewon Kim (7 out of 7 patents)

Sung Ryul Hwang (6 out of 6 patents)

4. Chang Bong Yoon (6 out of 6 patents)

5. Hak Jae Kim (3 out of 4 patents)

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