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% Expired Patents = 80.0

Forward Citations = 18

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21 inventors (with patents filed for the assignee):

Noriaki Saito (2 out of 60 patents)

Hyeong-Keor Yoo (2 out of 2 patents)

Kye Hyeon Ryu (1 out of 1 patent)

4. Kunihiro Takahashi (1 out of 24 patents)

5. Toru Akiyama (1 out of 2 patents)

6. Kazuo Takemura (1 out of 2 patents)

7. Hyeon Kyu Joo (1 out of 1 patent)

8. Minehiro Tonosaki (1 out of 1 patent)

9. Fumiyasu Ikarashi (1 out of 1 patent)

10. Hideo Kawaguchi (1 out of 1 patent)

11. Je-Suk Woo (1 out of 1 patent)

12. Sung-il Kim (1 out of 1 patent)

13. Chang-guen Lee (1 out of 1 patent)

14. Je-suk Woo (1 out of 1 patent)

15. Hee June Park (1 out of 1 patent)

5 patents: Sort by Forward Citations

1. 9612141 - Ultrasonic flow measurement system (2017-04-04),

2. 9494453 - Ultrasonic sensor for high temperature and manufacturing method thereof (2016-11-15),

3. 6887555 - Floor covering based on perforated PVC sheet (2005-05-03),

4. 6733888 - Floor-covering material using phenol composite resin (2004-05-11),

5. 5891388 - Fe-Mn vibration damping alloy steel having superior tensile strength and (1999-04-06),

Woojin Corporation is a leading global provider of innovative solutions in the fields of manufacturing and construction. With a focus on quality, reliability, and sustainability, Woojin Corporation has built a strong reputation for delivering cutting-edge products and services to clients around the world. From heavy machinery to eco-friendly building materials, Woojin Corporation continues to drive progress and innovation in the industry.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Oct 6 2026

5 Patents

#13 in Bucheon

#1,877 in South Korea

Bucheon, South Korea

Woojin Corporation