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发明名称
MEANS FOR DIMINISHING BACKGROUND NOISE IN THE PHOTO-ELECTRIC RECORDING OF SOUND
摘要
申请公布号
CA477941(A)
申请公布日期
1951.10.23
申请号
CAD477941
申请日期
申请人
ALBERTO LAFFON Y SOTO;EZEQUIEL DE SELGAS Y MARIN
发明人
EZEQUIEL DE SELGAS Y MARIN;ALBERTO LAFFON Y SOTO
分类号
主分类号
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代理人
主权项
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