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发明名称
Modulating system
摘要
申请公布号
US1941303(A)
申请公布日期
1933.12.26
申请号
US19310582275
申请日期
1931.12.21
申请人
HEINTZ & KAUFMAN, LTD.
发明人
HEINTZ RALPH M.
分类号
H03C1/32
主分类号
H03C1/32
代理机构
代理人
主权项
地址
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