Patent search ap:("POLAROID CORP") AND inv:"SHEPHERD JR RIDGLEY G" Page 1

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发明授权
Filter transparent to infrared radiation and opaque to visible light 失效
Title translation: 过滤透明至红外辐射，不透明至可见光

公开(公告)号：US2418605A

公开(公告)日：1947-04-08

申请号：US56824244

申请日：1944-12-15

Applicant: POLAROID CORP

Inventor： SHEPHERD JR RIDGLEY G , WEST CUTLER D

IPC: A61N5/06 , G02B5/20

CPC classification number: G02B5/208 , A61N5/06

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