US1023358A - Face-mask. - Google Patents
US1023358A US60766511A US1911607665A US1023358A US 1023358 A US1023358 A US 1023358A US 60766511 A US60766511 A US 60766511A US 1911607665 A US1911607665 A US 1911607665A US 1023358 A US1023358 A US 1023358A Authority US United States Prior art keywords mask tapes neck mouth lillian Prior art date 1911-02-09 Legal status (The legal status is an …