国家/地区
IPC部 A（2）
IPC大类 A41（2）
IPC小类 A41D（2）
IPC C02F001/28（2）
发明人
公开年 2021（2）
申请年 2021（2）
专利权人

Four-columns water filter system has three filtering bed in each column, where three filtering bed comprises filter I or first filter bed-made-up of functionalized graphene, filter II or second filter bed-made-up of cotton supported bed.

GAUTAM S, KUMAR A, VASHISTHA V K, DAS D K, SHARMA K, PRAKASH S

Face mask e.g. surgical face mask, comprises mask component to cover wearer's mouth and nose, and fastener engaging with mask component comprising air-permeable outer layer, inner layer located on inner side of mask component, and graphene layer, where fastener connects mask component to wearer.

ZHAMU A, JANG B Z, ZHANG B