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公开(公告)号：US1655550A
公开(公告)日：1928-01-10
申请号：US15362326
申请日：1926-12-09
Applicant: ROBERT MITCHELL COMPANY LTD
Inventor： KENNEDY HUGH M
IPC: E06B3/90
CPC classification number: E06B3/90 , E05Y2900/132
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公开(公告)号：US1769346A
公开(公告)日：1930-07-01
申请号：US26244928
申请日：1928-03-17
Applicant: ROBERT MITCHELL COMPANY LTD
Inventor： KENNEDY HUGH M
IPC: B65G11/04
CPC classification number: B65G11/04
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