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发明名称
Chain shifting device for bicycles and the like
摘要
申请公布号
US2431513(A)
申请公布日期
1947.11.25
申请号
US19440559702
申请日期
1944.10.21
申请人
SCHWINN FRANK W
发明人
SCHWINN FRANK W.
分类号
B62M9/124;B62M9/1246;B62M9/127
主分类号
B62M9/124
代理机构
代理人
主权项
地址
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