Materials Reports  2020, Vol. 34 Issue (Z1): 552-556    
POLYMERS AND POLYMER MATRIX COMPOSITES |
Research on the Development of Nanofiber Membrane Used for MaskBased on Patent Perspective
SHI Gangyin, GAO Qiuju
Patent Examination Cooperation Jiangsu Center of the Patent Office, CNIPA, Suzhou 215163, China