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公开(公告)号:US1376643A
公开(公告)日:1921-05-03
申请号:US21899118
申请日:1918-02-25
Applicant: JOHN ROLLI
Inventor: JOHN ROLLI
IPC: E02F3/64
CPC classification number: E02F3/54 , E02F3/6463
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公开(公告)号:US1519334A
公开(公告)日:1924-12-16
申请号:US47969521
申请日:1921-06-22
Applicant: JOHN ROLLI
Inventor: JOHN ROLLI
IPC: B60B39/12
CPC classification number: B60B39/12
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公开(公告)号:US1473519A
公开(公告)日:1923-11-06
申请号:US28453219
申请日:1919-03-24
Applicant: JOHN ROLLI
Inventor: JOHN ROLLI
IPC: A01B49/02
CPC classification number: A01B49/027
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