Group 1 - The State Intellectual Property Office of China has granted a patent for a "Column and Support System" to China Coal Technology & Engineering Group Mining Research Institute Co., Ltd., Yanzhou Coal Mining Company Limited, and Tiandi Technology Co., Ltd. The patent authorization announcement number is CN116104552B, with an application date of December 2022 [1] - China Coal Technology & Engineering Group Mining Research Institute Co., Ltd. was established in 2020, located in Beijing, with a registered capital of 50 million RMB. The company has invested in 3 enterprises, participated in 928 bidding projects, and holds 1,785 patent records, along with 10 administrative licenses [1] - Yanzhou Coal Mining Company Limited was founded in 1997, located in Jining, with a registered capital of approximately 1,003,986.04 million RMB. The company has invested in 61 enterprises, participated in 5,000 bidding projects, and has 298 trademark records and 2,326 patent records, in addition to 48 administrative licenses [1] - Tiandi Technology Co., Ltd. was established in 2000, located in Beijing, with a registered capital of approximately 413,858.89 million RMB. The company has invested in 29 enterprises, participated in 1,959 bidding projects, and holds 33 trademark records and 1,888 patent records, along with 19 administrative licenses [2]