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发明名称
Verfahren zum photographischen Aufzeichnen von Tönen in Intensitätsschrift.
摘要
申请公布号
AT133647(B)
申请公布日期
1933.06.10
申请号
ATD133647
申请日期
1931.08.11
申请人
ARNOLD POULSEN;AXEL CARL GEORG PETERSEN
发明人
ARNOLD POULSEN;AXEL CARL GEORG PETERSEN
分类号
主分类号
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