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公开(公告)号：US2218887A
公开(公告)日：1940-10-22
申请号：US23212138
申请日：1938-09-28
Applicant: CURTIS COMPANIES INC
Inventor： SERN MADSEN , MUELLER HILBERT C
IPC: E06B7/06
CPC classification number: E06B7/06
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