Box spring assembly with crosswires having integral sinuous end

Box spring assembly with improved corner springs

Box spring assembly with improved spring installation capability

Box spring assembly with interlocked formed wire spring componen

Box spring support module

Box spring unit with interlocking spring and grid assembly

Box spring with wire columns and partial coils

Coil spring and spring assembly

Coil spring assembly

Coil spring assembly

Coil spring assembly

Coil spring assembly and forming method

Coil spring assembly with grid and base frame

Coil spring mattress core

Collapsible box spring

Combination round coil spring and rectangular torsion coil sprin

Cushion support element

Device for connecting springs to form a support surface therewit

Device for locally adjusting the tension of an elastic sheet, in

Device to obtain a supplementary springing effect in supporting