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发明名称
Cover
摘要
申请公布号
US2412262(A)
申请公布日期
1946.12.10
申请号
US19440532176
申请日期
1944.04.21
申请人
WILLIAM HALPERN;KURT WEINER;RUDOLF KROCHMAL
发明人
HALPERN WILLIAM;WEINER KURT;KROCHMAL RUDOLF
分类号
G04B37/00
主分类号
G04B37/00
代理机构
代理人
主权项
地址
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