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发明名称
Sound distributor
摘要
申请公布号
US1757145(A)
申请公布日期
1930.05.06
申请号
US19260154542
申请日期
1926.12.13
申请人
HENRY SCHLEIFFERS ERNEST
发明人
SCHLEIFFERS ERNEST HENRY
分类号
G10K13/00
主分类号
G10K13/00
代理机构
代理人
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