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公开(公告)号：US2583073A
公开(公告)日：1952-01-22
申请号：US78880947
申请日：1947-11-29
Applicant: JACKSON & CHURCH COMPANY
Inventor： AHLBORN CLARENCE E
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公开(公告)号：US2664814A
公开(公告)日：1954-01-05
申请号：US1004948
申请日：1948-02-21
Applicant: JACKSON & CHURCH COMPANY
Inventor： AHLBORN CLARENCE E
IPC: B30B9/12
CPC classification number: B30B9/128
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