发明名称 |
Stair chair |
摘要 |
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申请公布号 |
US6435538(B1) |
申请公布日期 |
2002.08.20 |
申请号 |
US09/362651 |
申请日期 |
1999.07.27 |
申请人 |
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发明人 |
|
分类号 |
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主分类号 |
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代理机构 |
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代理人 |
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主权项 |
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地址 |
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