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经营范围
发明名称
Electric bell
摘要
申请公布号
US1983068(A)
申请公布日期
1934.12.04
申请号
US19330657542
申请日期
1933.02.20
申请人
EUGENE CARDONE
发明人
CARDONE EUGENE
分类号
G10K1/064
主分类号
G10K1/064
代理机构
代理人
主权项
地址
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