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公开(公告)号：US3009078A
公开(公告)日：1961-11-14
申请号：US74367258
申请日：1958-06-23
Applicant: BELL TELEPHONE LABOR INC
Inventor： ARTHUR ASHKIN
IPC: H01J25/49
CPC classification number: H01J25/49
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公开(公告)号：US2948828A
公开(公告)日：1960-08-09
申请号：US62362356
申请日：1956-11-21
Applicant: BELL TELEPHONE LABOR INC
Inventor： ARTHUR ASHKIN
IPC: H01J23/26
CPC classification number: H01J23/26
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