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发明名称
Electric door knocker
摘要
申请公布号
GB2250317(B)
申请公布日期
1994.07.27
申请号
GB19900025986
申请日期
1990.11.29
申请人
MICHAEL ALBERT * CROUCH
发明人
MICHAEL ALBERT * CROUCH
分类号
G10K3/00;(IPC1-7):G10K3/00
主分类号
G10K3/00
代理机构
代理人
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地址
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