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Cheongju-si, South Korea

Sk Keyfoundry Inc.

USPTO Granted Patents = 47

Trademarks = 1

Forward Citations = 0

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70 inventors (with patents filed for the assignee):

Keesik Ahn (7 out of 7 patents)

Kee Sik Ahn (5 out of 14 patents)

Sung Bum Park (5 out of 14 patents)

4. Sungbum Park (5 out of 7 patents)

5. Yang Beom Kang (4 out of 11 patents)

6. Kang Sup Shin (4 out of 13 patents)

7. Jong Yeul Jeong (4 out of 10 patents)

8. Hee Hwan Ji (3 out of 16 patents)

9. Min Kuck Cho (3 out of 12 patents)

10. Sang Geun Koo (3 out of 4 patents)

11. Seong Jun Park (3 out of 9 patents)

12. Wan-Chul Kong (3 out of 3 patents)

13. Weon-Hwa Jeong (3 out of 3 patents)

14. Jeong Ho Sheen (3 out of 3 patents)

15. Ji Man Kim (2 out of 4 patents)

47 patents: Sort by Forward Citations

1. 12489050 - Semiconductor device having high breakdown voltage capacitor (2025-12-02),

2. 12484259 - Non-volatile semiconductor memory device and method of manufacturing the same (2025-11-25),

3. 12464736 - Semiconductor device with digital isolator capacitor and manufacturing method thereof (2025-11-04),

4. 12457777 - Semiconductor device with deep trench isolation (2025-10-28),

5. 12456532 - eFuse OTP memory device including serial interface logic and operation method thereof (2025-10-28),

6. 12445131 - Bidirectional I/O circuit and integrated circuit including bidirectional I/O circuit (2025-10-14),

7. 12432912 - Mask-programmable read only memory with electrically isolated cells (2025-09-30),

8. 12424284 - Electrical fuse one time programmable (OTP) memory (2025-09-23),

9. 12374614 - Semiconductor device and semiconductor device manufacturing method with high-voltage isolation capacitor (2025-07-29),

10. 12356727 - High voltage semiconductor device with ESD self-protection capability and manufacturing method thereof (2025-07-08),

11. 12356691 - Semiconductor device having low on-resistance and low parasitic capacitance (2025-07-08),

12. 12354663 - Embedded flash memory and write operation method thereof (2025-07-08),

13. 12349452 - Bipolar-CMOS-DMOS semiconductor device having a deep trench isolation structure for high isolation breakdown voltage (2025-07-01),

14. 12327692 - Semiconductor device having a high breakdown voltage capacitor and method for forming the same (2025-06-10),

15. 12317546 - Split gate power MOSFET and split gate power MOSFET manufacturing method (2025-05-27),

Sk Keyfoundry Inc. is a leading manufacturer of high-quality keys and key blanks. With over 20 years of experience in the industry, we specialize in providing customized solutions for our clients. Our state-of-the-art facilities and experienced team ensure that we deliver top-notch products to meet our customers' needs. We are committed to excellence and customer satisfaction in every aspect of our business.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

47 Patents

#3 in Cheongju-si

#325 in South Korea

#14,382 in the World

Cheongju-si, South Korea

Sk Keyfoundry Inc.

Forward Citations = 0

70 inventors:

Keesik Ahn (7 out of 7 patents)

Kee Sik Ahn (5 out of 14 patents)

Sung Bum Park (5 out of 14 patents)

4. Sungbum Park (5 out of 7 patents)

5. Yang Beom Kang (4 out of 11 patents)

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