| 发明名称 |
HYDRAULIC ROW MARKER SYSTEM |
| 摘要 |
This invention is concerned with marking devices for squadron planters with the marking devices being operated by remote hydraulic devices which are in parallel with hydraulic means used for raising and lowering the planters.
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| 申请公布号 |
US3670823(A) |
申请公布日期 |
1972.06.20 |
| 申请号 |
USD3670823 |
申请日期 |
1970.06.18 |
| 申请人 |
ALLIS-CHALMERS MFG. CO. |
发明人 |
RALPH W. MATTHEWS;GERALD W. BERNHOFT;MICHAEL R. SCHMIDT |
| 分类号 |
A01B69/02;A01C7/20;(IPC1-7):A01B25/00;A01B49/06 |
主分类号 |
A01B69/02 |
| 代理机构 |
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