GENEVA, Sept. 8 -- HUANENG CLEAN ENERGY RESEARCH INSTITUTE (Laboratory A, Huaneng Talent Innovation and Venture Base, Future Science Park, BeiqijiaChangping District, Beijing 102209), 中国华能集团清洁能源技术研究院有限公司 (中国北京市昌平区北七家未来科技城华能人才创新创业基地实验楼A楼) filed a patent application (PCT/CN2024/133606) for "VARIABLE-FREQUENCY PENDULUM-TYPE DAMPING DEVICE, FLOATING FOUNDATION, AND ADJUSTMENT METHOD" on Nov 21, 2024. With pu...