LJRB(SH:600853) Sou Hu Cai Jing·2025-07-29 08:37Group 1 - The State Intellectual Property Office of China granted a patent to Sinopec Petroleum Engineering Technology Service Co., Ltd. for a noise suppression method, system, storage medium, and electronic device, with the authorization announcement number CN115016004B and application date of June 2022 [1] - Sinopec Petroleum Engineering Technology Service Co., Ltd. was established in 1994, located in Beijing, primarily engaged in civil engineering construction, with a registered capital of 1,898,434,003.33 RMB [1] - The company has made investments in 14 enterprises, participated in 126 bidding projects, holds 1 trademark, and has 1,904 patent records, along with 2 administrative licenses [1] Group 2 - Sinopec Petroleum Engineering Geophysical Co., Ltd. was established in 2012, also located in Beijing, primarily engaged in professional technical services, with a registered capital of 30,000,000 RMB [1] - This company has invested in 1 enterprise, participated in 1,930 bidding projects, holds 343 patent records, and possesses 515 administrative licenses [1]