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公开(公告)号:US2929962A
公开(公告)日:1960-03-22
申请号:US58320156
申请日:1956-05-07
Applicant: BELL TELEPHONE LABOR INC
Inventor: JACOBY GERALD E , KETCHLEDGE RAYMOND W
CPC classification number: H01J17/30 , H01J65/042
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公开(公告)号:US2883470A
公开(公告)日:1959-04-21
申请号:US61713156
申请日:1956-10-19
Applicant: BELL TELEPHONE LABOR INC
Inventor: JACOBY GERALD E , RIEKE JOHN W
IPC: H04Q3/52
CPC classification number: H04Q3/521
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