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发明名称
Process for introducing active metal into alpha vacuum tube
摘要
申请公布号
US1931647(A)
申请公布日期
1933.10.24
申请号
US19310574810
申请日期
1931.11.13
申请人
RADIO CORPORATION
发明人
BOER JAN HENDRIK DE;JONKER JOHAN LODEWIJK HENDRIK;GESSEL KAREL MARINUS VAN
分类号
H01J9/395
主分类号
H01J9/395
代理机构
代理人
主权项
地址
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