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经营范围
发明名称
Vacuum tube
摘要
申请公布号
US1869566(A)
申请公布日期
1932.08.02
申请号
US19260140245
申请日期
1926.10.08
申请人
ARCTURUS RADIO TUBE COMPANY
发明人
KRAHL WALTER LOUIS
分类号
C04B37/02;H01J1/20;H01J19/30
主分类号
C04B37/02
代理机构
代理人
主权项
地址
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