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发明名称
AUDIO-VISUAL RECORDING AND DISPLAY METHODS AND APPARATUS
摘要
申请公布号
GB1236784(A)
申请公布日期
1971.06.23
申请号
GB19680054562
申请日期
1968.11.18
申请人
BELL & HOWELL COMPANY
发明人
分类号
G03B31/00;G03B31/04;G09B5/06
主分类号
G03B31/00
代理机构
代理人
主权项
地址
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