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41.Comparison type densitometer and electronic measuring circuit therefor 失效
Title translation: 比较型密度计及其电子测量电路公开(公告)号:US2561243A
公开(公告)日:1951-07-17
申请号:US66252946
申请日:1946-04-16
Applicant: GEN ANILINE & FILM CORP
Inventor: SWEET MONROE H
IPC: G01J1/30
CPC classification number: G01J1/30
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公开(公告)号:US2477208A
公开(公告)日:1949-07-26
申请号:US66692546
申请日:1946-05-03
Applicant: ANTOINE ROUY AUGUSTE LOUIS MAR
Inventor: ANTOINE ROUY AUGUSTE LOUIS MAR
IPC: G01J1/30
CPC classification number: G01J1/30
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公开(公告)号:US1739373A
公开(公告)日:1929-12-10
申请号:US20435727
申请日:1927-07-08
Applicant: RACE CHARLES N
Inventor: RACE CHARLES N
IPC: G01J1/30
CPC classification number: G01J1/30
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