For the Inventor, By the Inventor

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Chungcheongbuk-do, South Korea

Microfilter Co., Ltd.

USPTO Granted Patents = 14

EPO Patents = 11

Trademarks = 1

Forward Citations = 138

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20 inventors (with patents filed for the assignee):

Joung Whi Dong (6 out of 9 patents)

Pilkang Hwang (6 out of 7 patents)

Jaeik Lee (5 out of 5 patents)

4. WhiDong Joung (4 out of 4 patents)

5. PilKang Hwang (4 out of 5 patents)

6. JaeIk Lee (2 out of 4 patents)

7. Jaelk Lee (2 out of 2 patents)

8. Kyong Su Lee (2 out of 4 patents)

9. Pil Kang Hwang (2 out of 3 patents)

10. Min Kyu Jung (2 out of 4 patents)

11. Hyun Woo Lee (1 out of 290 patents)

12. Dae Yeon Cho (1 out of 1 patent)

13. Bo Kyoung Chae (1 out of 1 patent)

14. Whi Dong Joung (1 out of 2 patents)

15. Dong Hyun Kim (1 out of 77 patents)

14 patents: Sort by Forward Citations

1. D1036621 - Filter for water purification (2024-07-23),

2. D994835 - Filter case for water purification (2023-08-08),

3. 11484817 - Filter assembly capable of adjusting elimination of solid materials using flow-variable bypass flow path (2022-11-01),

4. D930787 - Filter for water purification (2021-09-14),

5. D895014 - Label for activation (2020-09-01),

6. 10173157 - Filter assembly (2019-01-08),

7. 10040005 - Serial flow channel type filter cartridge (2018-08-07),

8. 10016703 - Parallel flow channel type filter cartridge (2018-07-10),

9. 9993757 - Filter cartridge assembly (2018-06-12),

10. 9885445 - Locking-unlocking structure for guiding forward lifting of lifting body by repeating pushing action (2018-02-06),

11. 9863575 - Locking-unlocking structure for stopping lifting body, which is lifted and fallen through repetition of pushing actions, in lifting state and for releasing stopping state of lifting body (2018-01-09),

12. D776237 - Water purifying filter (2017-01-10),

13. D768814 - Water purifying filter (2016-10-11),

14. D768813 - Water purifying filter (2016-10-11),

Microfilter Co., Ltd. is a leading manufacturer of high-quality air and liquid filtration products. With over 20 years of experience in the industry, we provide innovative solutions to meet the diverse needs of our customers. Our products are designed to improve air quality, increase efficiency, and enhance overall performance. We are committed to delivering exceptional products and services to our clients worldwide.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

14 Patents

#10 in Chungcheongbuk-do

#820 in South Korea

#42,168 in the World

Chungcheongbuk-do, South Korea

Microfilter Co., Ltd.

Forward Citations = 138

20 inventors:

Joung Whi Dong (6 out of 9 patents)

Pilkang Hwang (6 out of 7 patents)

Jaeik Lee (5 out of 5 patents)

4. WhiDong Joung (4 out of 4 patents)

5. PilKang Hwang (4 out of 5 patents)

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