发明名称 OVERHEAD PROJECTION HIGHLIGHTING DEVICE AND METHOD OF USE
摘要 OVERHEAD PROJECTION HIGHLIGHTTNG DEVICE AND METHOD OF USE A highlighting device and method of use for focusing audience attention on an overhead projection is disclosed whereby a generally flat color tinted and light transmissive body having upper and lower surfaces with an optional handle and feet is employed as a register/highlighter for aligning and emphasizing an information transparency sheet.
申请公布号 CA2018138(A1) 申请公布日期 1990.12.02
申请号 CA19902018138 申请日期 1990.06.01
申请人 DOWNUM, DANIEL L.;LAFOND, ROBERT L. 发明人 DOWNUM, DANIEL L.;LAFOND, ROBERT L.
分类号 G03B21/26;(IPC1-7):G01D13/22;G03B21/132;G03B21/54 主分类号 G03B21/26
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