-
公开(公告)号：US2853920A
公开(公告)日：1958-09-30
申请号：US50743255
申请日：1955-05-10
Applicant: LEITZ ERNST GMBH
Inventor： OTTO MALFELD , HELMUT BECKER , WALTER MANDLER , KREIS WETZLAR , ARTUR KOCH , ERNST MARTIN
IPC: G02B21/00
CPC classification number: G02B21/0016
Search Results
1
records
(took 0.011 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
