The manufacturer, AT&M Biomaterial Corp., Ltd., has passed the certification of ISO13485:2003. aaAlloy Composition: 43%Ag, 32% The ... manufacturer, AT&M Biomaterial Corp., Ltd., has passed the certification of ISO13485:2003. ŸAlloy Composition: 43%Ag, 32 ... ) is the biomedical branch of Advanced Technology & Materials Corp., Ltd which is the main member of CISRI Group. AT&M Biomaterials began ...