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公开(公告)号：US1709492A
公开(公告)日：1929-04-16
申请号：US24253727
申请日：1927-12-27
Applicant: GRAND RAPIDS HARDWARE COMPANY
Inventor： SEELBACH JOHN F
IPC: F16H55/50
CPC classification number: F16H55/50 , Y10S474/902
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