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公开(公告)号：US1397431A
公开(公告)日：1921-11-15
申请号：US36530620
申请日：1920-03-12
Applicant: LITCHFIELD LEE J
Inventor： LITCHFIELD LEE J
IPC: A41B3/08
CPC classification number: A41B3/08 , Y10T24/1966 , Y10T24/314 , Y10T24/3497
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