发明名称 Viewing panel for producing multiple images of a design
摘要 A supporting frame with a handle has a transparent supporting plate mounted therein. The plate supports a thin transparency over the exposed surface of the plate. The transparency has a multiplicity of demagnifying fresnel lenses formed therein in abutting relation and in vertical and horizontal rows. The lens areas are rectangular in outline with very fine and closely spaced concentric light refracting grooves formed in one surface of the transparency and extending to the edges of the several areas. The frame has retaining shoulders therearound for removably holding one of several different opaque silhouette cards of different household furnishing articles, which are provided, along one edge of the frame.
申请公布号 US4117615(A) 申请公布日期 1978.10.03
申请号 US19770767471 申请日期 1977.02.10
申请人 JOHNSTONS & ASSOCIATES, INC. 发明人 GOMOLAK, THEODORE M.
分类号 G09F5/00;(IPC1-7):G09F11/00 主分类号 G09F5/00
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