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发明名称
Perfectionnements aux circuits modificateurs de la forme d'onde des signaux électriques, tels que les signaux télégraphiques
摘要
申请公布号
FR729535(A)
申请公布日期
1932.07.26
申请号
FRD729535
申请日期
1931.03.21
申请人
LE MATERIEL TELEPHONIQUE
发明人
分类号
H03K5/01;H04L25/24
主分类号
H03K5/01
代理机构
代理人
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