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发明名称
Perfectionnements aux appareils téléphoniques utilisables, d'une manière générale, mais plus spécialement à bord des aéronefs
摘要
申请公布号
FR701413(A)
申请公布日期
1931.03.16
申请号
FRD701413
申请日期
1930.08.28
申请人
TELEPHONE MANUFACTURING COMPANY (1929) LIMITED
发明人
分类号
H04M1/05
主分类号
H04M1/05
代理机构
代理人
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