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公开(公告)号:US969357A
公开(公告)日:1910-09-06
申请号:US1909510400
申请日:1909-07-30
Applicant: FREDRUM JOHN W
Inventor: FREDRUM JOHN W
公开(公告)号:US969357A
公开(公告)日:1910-09-06
申请号:US1909510400
申请日:1909-07-30
Applicant: FREDRUM JOHN W
Inventor: FREDRUM JOHN W