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发明名称
Improvements relating to the photographic recording of sound waves
摘要
申请公布号
GB344904(A)
申请公布日期
1931.03.16
申请号
GB19290035006
申请日期
1929.11.15
申请人
N.V. KUCHENMEISTER'S INTERNATIONALE MAATSCHAPPIJ VOOR SPREKENDE FILMS, AMSTERDAM-BERLIN
发明人
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
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