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经营范围
发明名称
Pool type cathode with means for accelerating arc formation
摘要
申请公布号
US2507434(A)
申请公布日期
1950.05.09
申请号
US19480038666
申请日期
1948.07.14
申请人
DE LANY BEATRICE PEARSON;COPELAND PAUL L
发明人
LANY BEATRICE PEARSON DE;COPELAND PAUL L.
分类号
H01J13/02
主分类号
H01J13/02
代理机构
代理人
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地址
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