发明名称 WELDING HELMET HAVING A FILTER ARRANGEMENT
摘要 A welding helmet having a filter arrangement is disclosed. The welding helmet is provided with a main filter and at least one auxiliary filter separate from and positioned next to the main filter. The at least one auxiliary filter comprises an electro-optic element adapted to attenuate the transmission of optical radiation incident on the auxiliary filter.
申请公布号 WO2012074895(A2) 申请公布日期 2012.06.07
申请号 WO2011US62182 申请日期 2011.11.28
申请人 3M INNOVATIVE PROPERTIES COMPANY;MAGNUSSON, KRISTINA;JAREFORS, KENNETH 发明人 MAGNUSSON, KRISTINA;JAREFORS, KENNETH
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