发明名称 Double engraved identification card
摘要 A double engraved identification card has a first planar member with a first engraved image in one of its major planar surfaces and a second planar member with a second engraved image in one of its major planar surfaces. The first and second engraved images are aligned in coincidence and the first and second planar members affixed to one another so as to form a single composite image. A slot is provided between the first and second planar members between the first and second engraved images. The slot has an edge access opening to selectively receive an opaque card through the edge opening into the slot region and prevent simultaneous observation of both the first and second engraved images.
申请公布号 US4415612(A) 申请公布日期 1983.11.15
申请号 US19820338788 申请日期 1982.01.11
申请人 CALIFORNIA INTERFACE AND SOFTWARE LIMITED PARTNERSHIP 发明人 HALL, JOHN S.;PHELPS, BARRY C.
分类号 B42D15/10;(IPC1-7):B44F1/10 主分类号 B42D15/10
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