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公开(公告)号:US1805520A
公开(公告)日:1931-05-19
申请号:US33807029
申请日:1929-02-07
Applicant: GRUMBACHER M
Inventor: WALTER GRUMBACHER
IPC: G01J3/52
CPC classification number: G01J3/522
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公开(公告)号:US2227695A
公开(公告)日:1941-01-07
申请号:US19444038
申请日:1938-03-07
Applicant: GRUMBACHER M
Inventor: GEORGES BINON
IPC: B43K11/00
CPC classification number: B43K11/00
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