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发明名称
Process for the production of sound records with a metallic base for talking machines
摘要
申请公布号
US2008092(A)
申请公布日期
1935.07.16
申请号
US19320606299
申请日期
1932.04.19
申请人
METALLOPHON COMPANY, AKTIENGESELLSCHAFT
发明人
BIBER WILHELM
分类号
G11B3/70
主分类号
G11B3/70
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代理人
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