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公开(公告)号：US1428722A
公开(公告)日：1922-09-12
申请号：US21220018
申请日：1918-01-17
Applicant: PATTEN MFG COMPANY
Inventor： BENJAMIN UPTON FRANK , CLARK KIRK WILLIAM
IPC: F01P5/10
CPC classification number: F01P5/10
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