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公开(公告)号：US795336A
公开(公告)日：1905-07-25
申请号：US1905249759
申请日：1905-03-13
Applicant: J E PORTER COMPANY
Inventor： BURKHOLDER JOHN H
CPC classification number: B66C21/00
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公开(公告)号：US895156A
公开(公告)日：1908-08-04
申请号：US1908411843
申请日：1908-01-20
Applicant: J E PORTER COMPANY
Inventor： BURKHOLDER JOHN H
CPC classification number: E05D15/0634 , E05Y2201/64 , Y10T16/3831 , Y10T16/3834
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