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经营范围
发明名称
Procédé de télécommunication à secret.
摘要
申请公布号
CH225897(A)
申请公布日期
1943.02.28
申请号
CHD225897
申请日期
1938.08.11
申请人
BELL TELEPHONE MANUFACTURING COMPANY, SOCIETE ANONYME
发明人
BELL TELEPHONE MANUFACTURING COMPANY, SOCIETE ANONYME
分类号
A47J27/08;H04K1/04
主分类号
A47J27/08
代理机构
代理人
主权项
地址
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