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公开(公告)号：US2896083A
公开(公告)日：1959-07-21
申请号：US37058253
申请日：1953-07-27
Applicant: BECKMAN INSTRUMENTS INC
Inventor： HARE GEORGE H , MARGETTS DAVID R
IPC: H01J49/00
CPC classification number: H01J49/36
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公开(公告)号：US2769093A
公开(公告)日：1956-10-30
申请号：US37875653
申请日：1953-09-08
Applicant: BECKMAN INSTRUMENTS INC
Inventor： HARE GEORGE H , MARGETTS DAVID R
IPC: H01J49/00
CPC classification number: H01J49/36
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