发明名称 Microfiche viewer with rotatable base
摘要 A microfiche viewer with a light projection path whereby different images on an individual piece of microfilm can be placed in the light projection path for viewing. The fiche is rectangular in configuration and is inserted into the viewer with the shorter side parallel to the front of the viewer. A rotatable base is attached to the bottom of the viewer which is designed to limit the angular rotation of the microfiche viewer.
申请公布号 US4217039(A) 申请公布日期 1980.08.12
申请号 US19780951692 申请日期 1978.10.16
申请人 BELL & HOWELL 发明人 LEHTO, EINO M;POLINSKY, MICHAEL V;ZELLNER, JOHN R
分类号 G03B21/11;(IPC1-7):G03B23/08 主分类号 G03B21/11
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