United States Patent 3126554
US Patent References:
/0029846.html
- - 0029846

/0052426.html
- - 0052426

/0131034.html
- - 0131034

Bed spring
- - 2890464

Adjustable box springs
- - 2985895


Publication Date:
03/31/1964
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Primary Class:
5/243
Other Classes:
5/728, 297/284.300, 5/716
International Classes:
A47C23/043; A47C23/00
US Patent References:
3059249Adjustable box spring