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发明名称
Arc screen protection system
摘要
申请公布号
US1893504(A)
申请公布日期
1933.01.10
申请号
US19310541572
申请日期
1931.06.02
申请人
COMMUNICATION PATENTS, INC.
发明人
NICOLSON ALEXANDER MCLEAN
分类号
H04N3/10
主分类号
H04N3/10
代理机构
代理人
主权项
地址
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