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发明名称
Telephone signal light
摘要
申请公布号
US1864910(A)
申请公布日期
1932.06.28
申请号
US19320587026
申请日期
1932.01.16
申请人
JEWELL HAROLD D
发明人
JEWELL HAROLD D.
分类号
H04M19/04
主分类号
H04M19/04
代理机构
代理人
主权项
地址
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