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发明名称
Wave signaling system
摘要
申请公布号
US1921087(A)
申请公布日期
1933.08.08
申请号
US19320598640
申请日期
1932.03.14
申请人
HAZELTINE CORPORATION
发明人
MACDONALD WILLIAM A.
分类号
H03H7/01
主分类号
H03H7/01
代理机构
代理人
主权项
地址
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