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发明名称
Electron discharge device
摘要
申请公布号
US2148538(A)
申请公布日期
1939.02.28
申请号
US19340743058
申请日期
1934.09.07
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
DEPEW CHARLES;RONCI VICTOR L.
分类号
H01J19/42
主分类号
H01J19/42
代理机构
代理人
主权项
地址
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舖块之制造装置
轮胎
