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发明名称
Ratchet-driven odometer
摘要
申请公布号
US1788871(A)
申请公布日期
1931.01.13
申请号
US19270173036
申请日期
1927.03.05
申请人
A C SPARK PLUG COMPANY
发明人
HELGEBY RALPH OLAF
分类号
B60Q1/54;G01P3/495;G06M1/04;G06M1/06;H03K21/00
主分类号
B60Q1/54
代理机构
代理人
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地址
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