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1.
公开(公告)号:US2688405A
公开(公告)日:1954-09-07
申请号:US4317348
申请日:1948-08-09
Applicant: SHARPLES CORP
Inventor: SHARPLES LAURENCE P
IPC: B04B3/00
CPC classification number: B04B3/00
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公开(公告)号:US2409713A
公开(公告)日:1946-10-22
申请号:US45528842
申请日:1942-08-19
Applicant: SHARPLES CORP
Inventor: SHARPLES LAURENCE P
IPC: B04B11/02
CPC classification number: B04B11/02
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公开(公告)号:US2723799A
公开(公告)日:1955-11-15
申请号:US20921851
申请日:1951-02-03
Applicant: SHARPLES CORP
Inventor: SHARPLES LAURENCE P
IPC: B04B1/18
CPC classification number: B04B1/18
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公开(公告)号:US2446559A
公开(公告)日:1948-08-10
申请号:US54619844
申请日:1944-07-22
Applicant: SHARPLES CORP
Inventor: SHARPLES LAURENCE P
IPC: B04B11/02
CPC classification number: B04B11/02
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