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发明名称
SHADOWLESS PROJECTION SYSTEMS
摘要
申请公布号
US3539798(A)
申请公布日期
1970.11.10
申请号
USD3539798
申请日期
1967.07.18
申请人
DONALD M. PERRY
发明人
DONALD M. PERRY
分类号
G03B21/20;(IPC1-7):F21V13/04
主分类号
G03B21/20
代理机构
代理人
主权项
地址
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