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发明名称
LEITUNGSPRUEFSCHALTUNG FUER EINEN TEILNEHMERFERNSPRECHAPPARAT
摘要
申请公布号
DE3211811(A1)
申请公布日期
1982.11.18
申请号
DE19823211811
申请日期
1982.03.31
申请人
NAAMLOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN
发明人
GERRITSEN,FREDERIK,HENDRIK;JANSSEN,DANIEEL,JOHANNES,GERARDUS
分类号
G01R19/15;(IPC1-7):H04M1/00
主分类号
G01R19/15
代理机构
代理人
主权项
地址
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