发明名称 |
PUMP JACK |
摘要 |
|
申请公布号 |
CA398939(A) |
申请公布日期 |
1941.09.02 |
申请号 |
CAD398939 |
申请日期 |
|
申请人 |
RUDOLPH H. DEMMLER |
发明人 |
RUDOLPH H. DEMMLER |
分类号 |
|
主分类号 |
|
代理机构 |
|
代理人 |
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主权项 |
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地址 |
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