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Class Information
Number: 5/257
Name: Beds > Bedsteads > Having bottom > Of springs > Elements > Top-coil unions
Description: Devices, for means of connecting the end of the top coil of a spiral spring to the adjacent part of a lower turn of the same spring to form a closed top loop.

Patents under this class:

Patent Number Title Of Patent Date Issued
6578213 Stackable bedding foundation Jun. 17, 2003
5575460 Spring core for a mattress Nov. 19, 1996
4817924 Spring core for a mattress Apr. 4, 1989
4619445 Spring unit Oct. 28, 1986
4236262 Support grid and spring unit for a box spring foundation unit Dec. 2, 1980
4069525 Firm foundation unit for mattresses Jan. 24, 1978
4068330 Woven spring unit Jan. 17, 1978
4057860 Box spring assembly Nov. 15, 1977
4012801 Box spring assembly Mar. 22, 1977

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