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发明名称
Chime signal
摘要
申请公布号
US2810123(A)
申请公布日期
1957.10.15
申请号
US19560616280
申请日期
1956.10.16
申请人
NUTONE, INC.
发明人
MCEVOY JOSEPH
分类号
G10K1/066;G10K1/10
主分类号
G10K1/066
代理机构
代理人
主权项
地址
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