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1.发明授权
公开(公告)号：US2265323A
公开(公告)日：1941-12-09
申请号：US71494934
申请日：1934-03-10
Applicant: GEN ELECTRIC
Inventor： JOACHIM SPANNER HANS
IPC: H01J61/067 , H01J61/92 , H05B41/232
CPC classification number: H05B41/232 , H01J61/0675 , H01J61/92 , Y10S315/01 , Y10S315/05
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