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发明名称
Television sign
摘要
申请公布号
US2049763(A)
申请公布日期
1936.08.04
申请号
US19310556128
申请日期
1931.08.10
申请人
AMERICAN TELEVISION LABORATORIES, INC.
发明人
FOREST LEE DE
分类号
H04N3/12
主分类号
H04N3/12
代理机构
代理人
主权项
地址
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