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发明名称
Improvements in and relating to talking picture apparatus
摘要
申请公布号
GB350410(A)
申请公布日期
1931.05.27
申请号
GB19290037386
申请日期
1929.12.05
申请人
VISIONTONE TALKING PICTURES LIMITED;VISION TONE CORPORATION;OAKFIELDS TRUST LIMITED
发明人
分类号
G03B31/00
主分类号
G03B31/00
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代理人
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