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公开(公告)号：US2627777A
公开(公告)日：1953-02-10
申请号：US12527349
申请日：1949-11-03
Applicant: JOHN ROBBINS
Inventor： JOHN ROBBINS
IPC: G10C3/12
CPC classification number: G10C3/12
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公开(公告)号：US1705878A
公开(公告)日：1929-03-19
申请号：US22643227
申请日：1927-10-15
Applicant: JOHN ROBBINS
Inventor： JOHN ROBBINS
IPC: B60B39/08
CPC classification number: B60B39/06
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