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发明名称
Piezoelectric crystal apparatus
摘要
申请公布号
US2227904(A)
申请公布日期
1941.01.07
申请号
US19370180937
申请日期
1937.12.21
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
HIGHT STUART C.
分类号
H03H9/19
主分类号
H03H9/19
代理机构
代理人
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地址
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