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发明名称
Modulating system
摘要
申请公布号
US1983172(A)
申请公布日期
1934.12.04
申请号
US19310582274
申请日期
1931.12.21
申请人
HEINTZ & KAUFMAN, LTD.
发明人
HEINTZ RALPH M.
分类号
H03C5/00
主分类号
H03C5/00
代理机构
代理人
主权项
地址
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