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公开(公告)号：US1354661A
公开(公告)日：1920-10-05
申请号：US39102920
申请日：1920-06-23
Applicant: ARTHUR F DOLAN , FREDERICK A BULLOCK , WILLIAM G BENNETT
Inventor： KEENAN ELLSWORTH E
IPC: A41B3/08
CPC classification number: A41B3/08 , Y10T24/44932
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