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Seongnam, South Korea

Ctk Co., Ltd

USPTO Granted Patents = 18

EPO Patents = 14

Trademarks = 1

Forward Citations = 70

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14 inventors (with patents filed for the assignee):

In Yong Chung (10 out of 21 patents)

Jin Woo Kim (8 out of 30 patents)

In Young Um (3 out of 6 patents)

4. Won Eui Lee (3 out of 4 patents)

5. Kyung Ho Kang (3 out of 6 patents)

6. Myung Joong Kim (2 out of 2 patents)

7. Ji Yong Lee (2 out of 15 patents)

8. Jung Hun Jun (2 out of 2 patents)

9. Do Hoon Lee (1 out of 69 patents)

10. Yeong Min Eom (1 out of 1 patent)

11. Sun Young Choi (1 out of 12 patents)

12. Sung Hyeok Choi (1 out of 8 patents)

13. Andrew S Kim (1 out of 3 patents)

14. Minji Oh (1 out of 1 patent)

18 patents: Sort by Forward Citations

1. 12414619 - Eco cosmetic container (2025-09-16),

2. 11963600 - Cosmetic container having wiper capable of removing cosmetic liquid from application support rod having non-circular cross-sectional area (2024-04-23),

3. 11622613 - Stick type cosmetic container (2023-04-11),

4. D956784 - Display screen with graphical user interface (2022-07-05),

5. 11140965 - Airtight lip cosmetic case of which inside is doubly sealed (2021-10-12),

6. 11006723 - Push type cosmetic container (2021-05-18),

7. 10973300 - Airtight cosmetic-pencil container (2021-04-13),

8. 10722020 - Double wiping structure for toothbrush-type mascara wand (2020-07-28),

9. 10537164 - Cosmetic container with anti-contamination function for wiper (2020-01-21),

10. 10485324 - Stick type cosmetic case having screw structure (2019-11-26),

11. 10334935 - One-touch compact case having refillable structure (2019-07-02),

12. 10334931 - Puff-embedded cosmetic powder container (2019-07-02),

13. 10206480 - Porous pad for impregnation of liquid cosmetic composition and liquid-cosmetic-composition impregnating method using the same (2019-02-19),

14. 9930952 - Compact type of airtight cosmetic container (2018-04-03),

15. 9894980 - Rotary-push type cosmetic container (2018-02-20),

CTK CO., LTD is a leading technology company specializing in hardware and software solutions. With a focus on innovation and customer satisfaction, we provide cutting-edge products and services to clients from various industries. Our expertise includes developing advanced software applications, designing high-performance electronic devices, and delivering comprehensive IT solutions. Through our commitment to quality and reliability, we have gained the trust of our clients worldwide. Visit our website to learn more about our range of products and services.

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

Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

18 Patents

#7 in Seongnam

#653 in South Korea

#33,199 in the World

Seongnam, South Korea

Ctk Co., Ltd

Forward Citations = 70

14 inventors:

In Yong Chung (10 out of 21 patents)

Jin Woo Kim (8 out of 30 patents)

In Young Um (3 out of 6 patents)

4. Won Eui Lee (3 out of 4 patents)

5. Kyung Ho Kang (3 out of 6 patents)

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