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发明名称
VARIABLE FRAME VIEWFINDER FOR PHOTOGRAPHIC CAMERA
摘要
申请公布号
US3619202(A)
申请公布日期
1971.11.09
申请号
USD3619202
申请日期
1970.06.11
申请人
POLAROID CORP.
发明人
ALFRED H. BELLOWS
分类号
G03B13/02;(IPC1-7):G03B3/00
主分类号
G03B13/02
代理机构
代理人
主权项
地址
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