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发明名称
COLLAPSIBLE SCREEN ASSEMBLY
摘要
申请公布号
US3695746(A)
申请公布日期
1972.10.03
申请号
USD3695746
申请日期
1970.04.06
申请人
DONALD A. YOUNGBLOOD
发明人
DONALD A. YOUNGBLOOD
分类号
G03B21/30;G03B31/06;G09B5/06;(IPC1-7):G03B21/58
主分类号
G03B21/30
代理机构
代理人
主权项
地址
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