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公开(公告)号：US1143908A
公开(公告)日：1915-06-22
申请号：US1913779076
申请日：1913-07-15
Applicant: HEWITT JAMES MITCHELL
Inventor： HEWITT JAMES MITCHELL
CPC classification number: F16D13/18
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公开(公告)号：US714798A
公开(公告)日：1902-12-02
申请号：US1901080958
申请日：1901-11-02
Applicant: HEWITT JAMES MITCHELL , RHODES WILLIAM GOULD
Inventor： HEWITT JAMES MITCHELL , RHODES WILLIAM GOULD
CPC classification number: B61H7/02
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