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发明名称
Emergency telephone call and circuit therefor
摘要
申请公布号
US2453032(A)
申请公布日期
1948.11.02
申请号
US19450591274
申请日期
1945.05.01
申请人
JOSEPH PALUMBO
发明人
PALUMBO JOSEPH
分类号
H04M19/04
主分类号
H04M19/04
代理机构
代理人
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