GENEVA, Sept. 15 -- HUANENG COAL TECHNOLOGY RESEARCH CO., LTD. (Room 301, 3rd Floor, Building 8, Zone 17, No.188, Nansihuan West RoadFengtai District, Beijing 100070), 华能煤炭技术研究有限公司 (中国北京市丰台区南四环西路188号17区8号楼3层301室) filed a patent application (PCT/CN2024/082211) for "DUST-CONTAINING AIR FLOW PURIFICATION DEVICE, AND DUST-CONTAINING AIR FLOW PURIFICATION SYSTEM FOR EXCAVATION ROADWAY" on Mar 18, 2024. With publication no. WO/2025/184939, the details related to the patent application was published on Sep 11, 2025.
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