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公开(公告)号：US2242650A
公开(公告)日：1941-05-20
申请号：US27978239
申请日：1939-06-19
Applicant: DUPLEX INC
Inventor： MANTZ ALOYSIUS F
IPC: E05D13/00
CPC classification number: E05D13/1292 , Y10T16/641
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