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发明名称
Stepladder
摘要
申请公布号
US2189432(A)
申请公布日期
1940.02.06
申请号
US19380246309
申请日期
1938.12.17
申请人
MOORE HENRY T;PERROTT FRANK F W
发明人
MOORE HENRY T.;PERROTT FRANK F.W.
分类号
E06C1/397
主分类号
E06C1/397
代理机构
代理人
主权项
地址
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