INTERNATIONAL PATENT: CHINA RAILWAY CONSTRUCTION HEAVY INDUSTRY CORPORATION LIMITED, 中国铁建重工集团股份有限公司 FILES APPLICATION FOR "NEGATIVE-PRESSURE REVERSE VENTILATION SYSTEM AND SHIELD TUNNELING MACHINE"

GENEVA, Oct. 26 -- CHINA RAILWAY CONSTRUCTION HEAVY INDUSTRY CORPORATION LIMITED (No. 88, Dongqi Road, Economic And Technological Development ZoneChangsha, Hunan 410199), 中国铁建重工集团股份有限公司 (中国湖南省长沙市经济技术开发区东七线88号) filed a patent application (PCT/CN2024/119868) for "NEGATIVE-PRESSURE REVERSE VENTILATION SYSTEM AND SHIELD TUNNELING MACHINE" on Sep 19, 2024. With publication no. WO/2025/218108, the details related to the patent application was published on Oct 23, 2025.

Notably, the patent application was submitted unde...