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经营范围
发明名称
Arrangements for transmission and reception of sound waves
摘要
申请公布号
GB513701(A)
申请公布日期
1939.10.19
申请号
GB19380011427
申请日期
1938.04.13
申请人
ELECTROACUSTIC GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG
发明人
分类号
G01S1/72
主分类号
G01S1/72
代理机构
代理人
主权项
地址
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