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经营范围
发明名称
Circuit for capacity microphones or pickups
摘要
申请公布号
US2515791(A)
申请公布日期
1950.07.18
申请号
US19450635275
申请日期
1945.12.15
申请人
COLONIAL RADIO CORPORATION
发明人
JR. MADISON G. NICHOLSON,
分类号
H04R19/04
主分类号
H04R19/04
代理机构
代理人
主权项
地址
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