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Daejeon, South Korea

Elk Corporation

USPTO Granted Patents = 12

% Expired Patents = 33.3

EPO Patents = 1

Forward Citations = 82

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8 inventors (with patents filed for the assignee):

Yasushi Hanada (5 out of 5 patents)

Takashi Koyama (3 out of 117 patents)

Kwang Hyuk Bae (2 out of 2 patents)

4. Chul Woo Park (2 out of 30 patents)

5. Dong Hyuk Shin (2 out of 3 patents)

6. Nobuya Hayashi (1 out of 4 patents)

7. Alfred B Malmquist (1 out of 3 patents)

8. John G Freshwater (1 out of 1 patent)

9. Takashi Koyama (0 patent)

12 patents: Sort by Forward Citations

1. 10409331 - Cover glass for electronic device (2019-09-10),

2. 10365689 - Transparent cover for electronic device (2019-07-30),

3. 9463259 - Sterilizing apparatus and sterilizing method (2016-10-11),

4. 9320819 - Sterilization apparatus and method (2016-04-26),

5. 9173968 - Sterilization apparatus and sterilization method (2015-11-03),

6. 9044748 - Cartridge (2015-06-02),

7. 8894926 - Sterilization apparatus and sterilization method (2014-11-25),

8. 8815172 - Installation apparatus and sterilizing apparatus and method (2014-08-26),

9. 8012415 - Sterilization method and plasma sterilization apparatus (2011-09-06),

10. 7482747 - Flexible EL device (2009-01-27),

11. 7411143 - Flexible EL dome sheet and flexible EL dome sheet keypad using the same (2008-08-12),

12. 4559267 - Stick-down system for roofing (1985-12-17),

Elk Corporation, based in Daejeon, South Korea, specializes in advanced materials and innovative technologies. The company focuses on developing high-performance products for various industries, including electronics, automotive, and construction. With a commitment to research and development, Elk Corporation aims to enhance product efficiency and sustainability through cutting-edge solutions. Its expertise in material science and engineering positions it as a key player in the global market, driving advancements in technology and manufacturing processes.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

12 Patents

#53 in Daejeon

#934 in South Korea

#48,129 in the World

Daejeon, South Korea

Elk Corporation

Forward Citations = 82

8 inventors:

Yasushi Hanada (5 out of 5 patents)

Takashi Koyama (3 out of 117 patents)

Kwang Hyuk Bae (2 out of 2 patents)

4. Chul Woo Park (2 out of 30 patents)

5. Dong Hyuk Shin (2 out of 3 patents)

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