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公开(公告)号：US2741153A
公开(公告)日：1956-04-10
申请号：US30960652
申请日：1952-09-15
Applicant: KAPELLA LTD
Inventor： EDMUND REASON RICHARD , REGINALD ADAMS JOHN , ROY COLEMAN KENNETH
IPC: G02B21/00
CPC classification number: G02B21/0016
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公开(公告)号：US2724987A
公开(公告)日：1955-11-29
申请号：US30982252
申请日：1952-09-16
Applicant: KAPELLA LTD
Inventor： EDMUND REASON RICHARD , REGINALD ADAMS JOHN , ROY COLEMAN KENNETH
IPC: G02B21/00
CPC classification number: G02B21/0016
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