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发明名称
Electroacoustic system
摘要
申请公布号
US2539593(A)
申请公布日期
1951.01.30
申请号
US19450605722
申请日期
1945.07.18
申请人
HARVEY RINES ROBERT
发明人
RINES ROBERT HARVEY
分类号
B06B1/02;G01S1/72;H03C7/02
主分类号
B06B1/02
代理机构
代理人
主权项
地址
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