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发明名称
Perfectionnements apportés aux procédés et appareils pour indiquer ou enregistrerles habitudes des radio-auditeurs et téléspectateurs vis-à-vis de leurs postes respectifs
摘要
申请公布号
FR1156948(A)
申请公布日期
1958.05.22
申请号
FRD1156948
申请日期
1956.07.16
申请人
A. C. NIELSEN COMPANY LIMITED
发明人
分类号
H04H60/43
主分类号
H04H60/43
代理机构
代理人
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