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公开(公告)号：US2815474A
公开(公告)日：1957-12-03
申请号：US63627957
申请日：1957-01-25
Applicant: PACIFIC SEMICONDUCTORS INC
Inventor： LEWIS JR WILLIAM M , FRAZIER HENRY D
IPC: H01J5/26
CPC classification number: H01J5/26 , H01J2893/0043
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