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公开(公告)号：US700433A
公开(公告)日：1902-05-20
申请号：US1902096679
申请日：1902-03-04
Applicant: EMMA M TOMSON , MARTIN E BRIGHAM , HARRY K BUCK , P C TOMSON AND COMPANY
Inventor： LOCKWOOD EDWARD M JR
CPC classification number: C06F1/08
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