发明名称 |
Sleep unit having adjustable firmness |
摘要 |
A sleep unit having inner coil springs is adjustable for firmness by movement of an inner plate or frame having portions which extend between selected turns of the springs.
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申请公布号 |
US4667357(A) |
申请公布日期 |
1987.05.26 |
申请号 |
US19860917074 |
申请日期 |
1986.10.08 |
申请人 |
FORTUNE, RICHARD L. |
发明人 |
FORTUNE, RICHARD L. |
分类号 |
A47C23/043;A47C27/06;(IPC1-7):A47C23/04 |
主分类号 |
A47C23/043 |
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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