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经营范围
发明名称
Telephone call monitor
摘要
The invention relates to a device which filters telephone calls via a request to the caller to dial a validation code. This code, after comparison with the stored one, validates the telephone communication. <IMAGE>
申请公布号
FR2678795(A1)
申请公布日期
1993.01.08
申请号
FR19910008205
申请日期
1991.07.02
申请人
GOTLIBOWICZ JEAN
发明人
GOTLIBOWICZ JEAN SAMUEL
分类号
H04M1/665
主分类号
H04M1/665
代理机构
代理人
主权项
地址
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