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发明名称
Stepladder
摘要
申请公布号
US1801211(A)
申请公布日期
1931.04.14
申请号
US19290373276
申请日期
1929.06.24
申请人
SCHULZKE RICHARD F
发明人
SCHULZKE RICHARD F.
分类号
E06C1/393
主分类号
E06C1/393
代理机构
代理人
主权项
地址
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