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经营范围
发明名称
VARIABLE LOUDNESS ALARM MECHANISM
摘要
申请公布号
US3559396(A)
申请公布日期
1971.02.02
申请号
USD3559396
申请日期
1969.02.28
申请人
GENERAL ELECTRIC CO.
发明人
WILLIAM C. WINGLER
分类号
G04C21/18;(IPC1-7):G04B23/10
主分类号
G04C21/18
代理机构
代理人
主权项
地址
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