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经营范围
发明名称
Chime signal regulator
摘要
申请公布号
US3159717(A)
申请公布日期
1964.12.01
申请号
US19600041327
申请日期
1960.07.07
申请人
DICTOGRAPH PRODUCTS, INC.
发明人
LEHR PHILIP N.;LUPIA RICHARD
分类号
H04M19/04
主分类号
H04M19/04
代理机构
代理人
主权项
地址
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