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公开(公告)号:US1915259A
公开(公告)日:1933-06-20
申请号:US41046029
申请日:1929-11-29
Applicant: MAGNETIC MFG COMPANY
Inventor: HARMAN HAROLD W
IPC: B03C1/26
CPC classification number: B03C1/26 , Y10T292/11
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公开(公告)号:US2070813A
公开(公告)日:1937-02-16
申请号:US54120231
申请日:1931-06-01
Applicant: MAGNETIC MFG COMPANY
Inventor: STEARNS ROSWELL H , HARMAN HAROLD W
IPC: F16D27/08
CPC classification number: F16D27/08
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