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经营范围
发明名称
Flexible acoustic tube
摘要
申请公布号
US2489277(A)
申请公布日期
1949.11.29
申请号
US19450615903
申请日期
1945.09.12
申请人
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF WAR
发明人
FARALLA RAOUL A.
分类号
H04R25/00
主分类号
H04R25/00
代理机构
代理人
主权项
地址
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