Portable projector

申请公布号：US2067893(A)

申请号：US19360066335

申请日期：1936.02.29

申请公布日期：1937.01.19

申请人：

DE VRY HERMAN A

发明人：VRY HERMAN A. DE

分类号：G03B29/00

主分类号：G03B29/00

COPSAN

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