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经营范围
发明名称
Druckkammerlautsprecher
摘要
申请公布号
DE815978(C)
申请公布日期
1951.10.08
申请号
DE1950S001257
申请日期
1950.01.10
申请人
SIEMENS & HALSKE A. G.
发明人
KALUSCHE HEINRICH DIPL.-ING.;GRAUL SIEGFRIED DIPL.-ING.
分类号
H04R1/30
主分类号
H04R1/30
代理机构
代理人
主权项
地址
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