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经营范围
发明名称
Tube à électrons, en particulier tube électrique d'émission
摘要
申请公布号
FR895443(A)
申请公布日期
1945.01.24
申请号
FRD895443
申请日期
1943.06.11
申请人
PATENTVERWERTUNGS-GESELLSCHAFT MIT BESCHRANKTER HAFTUNG HERMES
发明人
分类号
H01J3/02
主分类号
H01J3/02
代理机构
代理人
主权项
地址
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