For the Inventor, By the Inventor

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Osan-si, South Korea

Ehwa Diamond Ind. Co., Ltd.

USPTO Granted Patents = 24

EPO Patents = 3

Trademarks = 1

Forward Citations = 594

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25 inventors (with patents filed for the assignee):

Chang Hyun Lee (10 out of 16 patents)

See Hyung Kim (4 out of 4 patents)

Joon Ho Chang (3 out of 6 patents)

4. So Young Yoon (2 out of 19 patents)

5. Jae Hyun Hong (2 out of 2 patents)

6. Youn Chul Kim (2 out of 2 patents)

7. Kim S Kwang (2 out of 2 patents)

8. Jung Su Han (2 out of 2 patents)

9. Jang Hyuk Ahn (2 out of 8 patents)

10. So Young Yun (1 out of 23 patents)

11. Dae-Yeon Rhee (1 out of 1 patent)

12. Nam-Kwang Kim (1 out of 3 patents)

13. Doo-Hoe Kim (1 out of 1 patent)

14. Hee-Dong Park (1 out of 10 patents)

15. Soo Kwang Kim (1 out of 3 patents)

24 patents: Sort by Forward Citations

1. 10478941 - Pad conditioner having reduced friction and method of manufacturing the same (2019-11-19),

2. D852601 - Polishing pad (2019-07-02),

3. 9868226 - Stone cutting device (2018-01-16),

4. D513952 - Saw blade (2006-01-31),

5. 6890250 - Diamond blade having rim type cutting tip for use in grinding or cutting apparatus (2005-05-10),

6. 6638153 - Diamond saw blade equipped with undercut preventing tip (2003-10-28),

7. 6588310 - Saw blade shank (2003-07-08),

8. 6564887 - Core drill (2003-05-20),

9. 6527634 - Grinding wheel with segments for preventing one-sided wear (2003-03-04),

10. 6526959 - Adhesive sheet for noise and shock absorption, and saw blade making use of it, and manufacturing methods therefor (2003-03-04),

11. D463965 - Grinding wheel (2002-10-09),

12. D460767 - Saw blade (2002-07-24),

13. 6416878 - Abrasive dressing tool and method for manufacturing the tool (2002-07-09),

14. D459374 - Saw blade (2002-06-26),

15. D459171 - Wheel for saw blade (2002-06-26),

Ehwa Diamond Ind. Co., Ltd. is a leading manufacturer of high-quality diamond tools and equipment for the construction and industrial sectors. With over 40 years of experience, Ehwa Diamond prides itself on innovative technology, superior quality, and outstanding customer service. Their products are used worldwide in cutting, grinding, and drilling applications for various materials such as concrete, stone, and metal.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

24 Patents

#2 in Osan-si

#528 in South Korea

#25,825 in the World

Osan-si, South Korea

Ehwa Diamond Ind. Co., Ltd.

Forward Citations = 594

25 inventors:

Chang Hyun Lee (10 out of 16 patents)

See Hyung Kim (4 out of 4 patents)

Joon Ho Chang (3 out of 6 patents)

4. So Young Yoon (2 out of 19 patents)

5. Jae Hyun Hong (2 out of 2 patents)

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