Wallace Woon-Fong Leung
Nanofiber Filter Facemasks and Cabin Filters (USA – US 8303693)
纳米纤维过滤面罩和舱室过滤器 (China – CN 104043286)
納米纖維過濾面罩和艙室過濾器 (HongKong – HK 1201777)
A filtration medium includes a fine filter layer having a plurality of nanofibers and a coarse filter layer having a plurality of micro fibers attached to the fine filter layer. The coarse filter layer is positioned proximal to a direction of fluid flow, and the fine filter layer is positioned distal to the direction of fluid flow.