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发明名称
Druckkammerlautsprecher
摘要
申请公布号
DE902015(C)
申请公布日期
1954.01.18
申请号
DE1940K005061D
申请日期
1940.09.04
申请人
KLANGFILM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG
发明人
ROESCH FRIEDRICH
分类号
H04R1/30
主分类号
H04R1/30
代理机构
代理人
主权项
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