Core Insights - A patent titled "Support Structure and Construction Method for Comprehensive Mining Face" has been granted to four companies, including China Coal Technology and Engineering Group, Tiandi Technology Co., Shanxi Qinxin Coal Industry Co., and the Coal Science Research Institute [1][2] Company Summaries - **China Coal Technology and Engineering Group**: Established in 2020, located in Beijing, primarily engaged in research and experimental development. The company has a registered capital of 50 million RMB, has invested in 3 companies, participated in 734 bidding projects, holds 1584 patents, and possesses 10 administrative licenses [1]. - **Tiandi Technology Co.**: Founded in 2000, also based in Beijing, focuses on technology promotion and application services. The registered capital is approximately 4.14 billion RMB. The company has invested in 29 enterprises, participated in 1808 bidding projects, holds 33 trademarks, 1759 patents, and has 17 administrative licenses [1]. - **Shanxi Qinxin Coal Industry Co.**: Established in 2011, located in Changzhi, primarily involved in capital market services. The registered capital is 1 billion RMB. The company has invested in 6 enterprises, participated in 86 bidding projects, holds 12 patents, and has 45 administrative licenses [2]. - **Coal Science Research Institute**: Founded in 2000, located in Beijing, engaged in research and experimental development. The registered capital is approximately 5.1 billion RMB. The institute has invested in 22 companies, participated in 415 bidding projects, holds 29 trademarks, 1238 patents, and has 46 administrative licenses [2].