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公开(公告)号：US2459637A
公开(公告)日：1949-01-18
申请号：US56577044
申请日：1944-11-29
Applicant: MOTOROLA INC
Inventor： NEIL FRIHART HENRY , JACKSON WILBUR C , WILLIAMS FREDRICK B
IPC: H01J29/89
CPC classification number: H01J29/89 , H01J2229/8907 , H01J2229/893
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