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发明名称
Tuning fork generator
摘要
申请公布号
US1909414(A)
申请公布日期
1933.05.16
申请号
US19280286042
申请日期
1928.06.16
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
MATTE ANDREW L.
分类号
H03B5/30
主分类号
H03B5/30
代理机构
代理人
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地址
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