GENEVA, Oct. 18 -- HUNAN FIREBIRD BATTERY TECHNOLOGY CO., LTD (Jinshi Road, Jinshi High-tech ZoneChangde, Hunan 415400), 湖南火鸟新材料科技有限公司 (中国湖南省常德市津市市嘉山街道高新技术产业开发区津市大道互联网产业园1栋办公楼二层202) filed a patent application (PCT/CN2024/133520) for "SOLID-PHASE HEAT ENERGY RECOVERY ENERGY-SAVING DEVICE" on Nov 21, 2024. With publication no. WO/2025/213776, the details related to the patent ap...