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发明名称
Transducers
摘要
申请公布号
US2944119(A)
申请公布日期
1960.07.05
申请号
US19570704175
申请日期
1957.12.20
申请人
PHILCO CORPORATION
发明人
ALBRIGHT ROBERT B.;MICHONSKI EDWARD J.;RICHARDSON FRANCIS
分类号
H04R19/00
主分类号
H04R19/00
代理机构
代理人
主权项
地址
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