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发明名称
Method and apparatus for resonance assurance devices
摘要
申请公布号
US2224224(A)
申请公布日期
1940.12.10
申请号
US19370179178
申请日期
1937.12.10
申请人
HALLAM JR DOUGLAS
发明人
JR. DOUGLAS HALLAM,
分类号
H03G3/26
主分类号
H03G3/26
代理机构
代理人
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地址
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