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Cheongju-si, South Korea

Key Foundry Co., Ltd

USPTO Granted Patents = 42

Trademarks = 1

Forward Citations = 22

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33 inventors (with patents filed for the assignee):

Min Kuck Cho (7 out of 12 patents)

Kee Sik Ahn (7 out of 14 patents)

Sung Bum Park (7 out of 14 patents)

4. Hyun Kwang Shin (6 out of 12 patents)

5. Seong Jun Park (6 out of 9 patents)

6. Jung Hwan Lee (6 out of 14 patents)

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

8. Jong Min Cho (5 out of 7 patents)

9. Tae Hoon Lee (5 out of 14 patents)

10. Su Jin Kim (5 out of 9 patents)

11. Kwang Il Kim (4 out of 17 patents)

12. Young Bae Kim (4 out of 19 patents)

13. Kang Sup Shin (3 out of 13 patents)

14. Jin Seong Chung (3 out of 6 patents)

15. In Chul Jung (3 out of 7 patents)

42 patents: Sort by Forward Citations

1. 11923368 - Semiconductor device with junction FET transistors having multi pinch-off voltages (2024-03-05),

2. 11915767 - Negative voltage switching device and non-volatile memory device using the same (2024-02-27),

3. 11862695 - Split gate power MOSFET and split gate power MOSFET manufacturing method (2024-01-02),

4. 11856769 - Semiconductor device with single poly non-volatile memory device and manufacturing method (2023-12-26),

5. 11854817 - Manufacturing method for deep trench capacitor with scalloped profile (2023-12-26),

6. 11854622 - Electrical fuse one time programmable (OTP) memory (2023-12-26),

7. 11848061 - Non-volatile memory device including sense amplifier and method for operating the same (2023-12-19),

8. 11825650 - Single poly non-volatile memory device and manufacturing method thereof (2023-11-21),

9. 11799493 - Analog-to-digital converter and operation method thereof (2023-10-24),

10. 11791409 - High voltage semiconductor device and manufacturing method of high voltage semiconductor device (2023-10-17),

11. 11764216 - Semiconductor device with controllable channel length and manufacturing method thereof (2023-09-19),

12. 11757011 - Semiconductor device with non-volatile memory cell and manufacturing method thereof (2023-09-12),

13. 11756992 - Semiconductor device with increased isolation breakdown voltage (2023-09-12),

14. 11696440 - Nonvolatile memory device (2023-07-04),

15. 11688795 - Semiconductor device with controllable channel length and manufacturing method of semiconductor device with controllable channel length (2023-06-27),

Key Foundry Co., Ltd is a leading manufacturing company specializing in the production of high-quality keys and related products. With years of experience and advanced technology, we provide a diverse range of key solutions for various industries and applications, including automotive, residential, commercial, and industrial sectors. Our commitment to exceptional quality, innovation, and customer satisfaction has made us a trusted partner for key manufacturing worldwide. Visit our website to explore our extensive product catalog and discover how Key Foundry Co., Ltd can meet your key requirements.

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Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

42 Patents

#4 in Cheongju-si

#344 in South Korea

#15,845 in the World

Cheongju-si, South Korea

Key Foundry Co., Ltd

Forward Citations = 22

33 inventors:

Min Kuck Cho (7 out of 12 patents)

Kee Sik Ahn (7 out of 14 patents)

Sung Bum Park (7 out of 14 patents)

4. Hyun Kwang Shin (6 out of 12 patents)

5. Seong Jun Park (6 out of 9 patents)

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