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发明名称
Talking picture screen
摘要
申请公布号
US1877941(A)
申请公布日期
1932.09.20
申请号
US19300494262
申请日期
1930.11.08
申请人
KEASBEY & MATTISON COMPANY
发明人
MORRIS WILLIAM H.
分类号
G03B21/56
主分类号
G03B21/56
代理机构
代理人
主权项
地址
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