GENEVA, Sept. 16 -- BEIJING RUIYAN BIOTECH CO., LTD. (Room 409, 4th Floor, Building 1, No. 38 Yongda Road, Daxing BioMedical Industry Base, Zhongguancun Science ParkDaxing District, Beijing 102629), 北京瑞颜生物科技有限公司 (中国北京市大兴区中关村科技园区大兴生物医药产业基地永大路38号1幢4层409室) filed a patent application (PCT/CN2025/081238) for "POLYAMINO ACID, PREPARATION METHOD FOR POLYAMINO ACID, AND USE OF POLYAMINO ACID AS BIOCOMPATIBLE FILLING MATERIAL" on Mar 07, 2025. Wit...