Group 1 - The State Intellectual Property Office of China has granted a patent to China National Petroleum Corporation (CNPC) for a method, device, computer equipment, and storage medium for determining seismic wave travel times, with the announcement number CN116136605B and application date in November 2021 [1] - CNPC, established in 1990 and headquartered in Beijing, primarily engages in oil and gas extraction, with a registered capital of 48.69 billion RMB [1] - CNPC has made investments in 107 companies, participated in 5,000 bidding projects, holds 1,441 trademark records, and has 5,000 patent records, along with 28 administrative licenses [1] Group 2 - China National Petroleum Group Geophysical Exploration Co., Ltd., established in 2000 and located in Baoding, focuses on professional technical services, with a registered capital of approximately 1.53 billion RMB [1] - This subsidiary has invested in 32 companies, participated in 2,396 bidding projects, holds 100 trademark records, and has 3,418 patent records, along with 278 administrative licenses [1]