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发明名称
Method and means for ventilating and fertilizing soil
摘要
申请公布号
US2341800(A)
申请公布日期
1944.02.15
申请号
US19410394198
申请日期
1941.05.19
申请人
PROTECTOSEAL COMPANY OF AMERICA, INC.
发明人
MARTIN RICHARD;BELLAMY HARRY T.
分类号
A01C21/00
主分类号
A01C21/00
代理机构
代理人
主权项
地址
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