Sou Hu Cai Jing·2026-01-23 12:30Group 1 - The State Intellectual Property Office of China has granted a patent for a sealing device, sealing system, oil tank, and tank truck to China National Petroleum Corporation and China Petroleum Group Safety and Environmental Protection Technology Research Institute [1] - China National Petroleum Corporation, established in 1990, is primarily engaged in oil and gas extraction, with a registered capital of 48.69 billion RMB [1] - The corporation has invested in 107 companies, participated in 5,000 bidding projects, and holds 1,440 trademark records and 5,000 patent records [1] Group 2 - China Petroleum Group Safety and Environmental Protection Technology Research Institute, founded in 2007, focuses on research and development, with a registered capital of 460 million RMB [1] - The institute has invested in 5 companies, participated in 478 bidding projects, and holds 9 trademark records and 618 patent records [1] - Additionally, the institute possesses 12 administrative licenses [1]