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发明名称
Improvements in optical apparatus for reproducing sound from electro-mechanically-produced records
摘要
申请公布号
GB417597(A)
申请公布日期
1934.10.01
申请号
GB19330009473
申请日期
1933.03.29
申请人
LA RECHERCHE INDUSTRIELLE FRANCAISE (R.I.F.) SOCIETE D'ETUDES POUR L'EXPLOITATION DES BREVETS NUBLAT
发明人
分类号
G11B7/003;G11B7/135
主分类号
G11B7/003
代理机构
代理人
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地址
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