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公开(公告)号：US2933978A
公开(公告)日：1960-04-26
申请号：US53426055
申请日：1955-09-14
Applicant: AMERICAN OPTICAL CORP
Inventor： PAUL ROSENTHAL
IPC: G03B21/11
CPC classification number: G03B21/111
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公开(公告)号：US2601128A
公开(公告)日：1952-06-17
申请号：US13796450
申请日：1950-01-11
Applicant: AMERICAN OPTICAL CORP
Inventor： PAUL ROSENTHAL , POLANYI MICHAEL L , NATHAN GOTTLIEB
IPC: G01N21/43
CPC classification number: G01N21/43
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