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经营范围
发明名称
Combined filter network and electromechanical transducer
摘要
申请公布号
US2480052(A)
申请公布日期
1949.08.23
申请号
US19460684083
申请日期
1946.07.16
申请人
HARTFORD NATIONAL BANK AND TRUST COMPANY
发明人
SCHENKEL GERRIT
分类号
H04R3/08;H04R11/00
主分类号
H04R3/08
代理机构
代理人
主权项
地址
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