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发明名称
Adjustable means for changing the contour of seat back rests
摘要
申请公布号
US2550831(A)
申请公布日期
1951.05.01
申请号
US19490102689
申请日期
1949.07.01
申请人
LINGENFELTER ROBERT E
发明人
LINGENFELTER ROBERT E.
分类号
A47C7/46;B60N2/22
主分类号
A47C7/46
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代理人
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