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公开(公告)号:US2925014A
公开(公告)日:1960-02-16
申请号:US62707356
申请日:1956-12-07
Applicant: HUGO ABRAMSON
Inventor: HUGO ABRAMSON
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公开(公告)号:US2919629A
公开(公告)日:1960-01-05
申请号:US23648551
申请日:1951-07-13
Applicant: HUGO ABRAMSON
Inventor: HUGO ABRAMSON
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公开(公告)号:US2033318A
公开(公告)日:1936-03-10
申请号:US61853232
申请日:1932-06-21
Applicant: HUGO ABRAMSON
Inventor: HUGO ABRAMSON
IPC: G01G23/00
CPC classification number: G01G23/00 , Y10T74/18888
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公开(公告)号:US2671401A
公开(公告)日:1954-03-09
申请号:US20608451
申请日:1951-01-15
Applicant: HUGO ABRAMSON
Inventor: HUGO ABRAMSON
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