Box spring corner support
Box spring cross rail incorporating extruded thrust bearing
Box spring grid and method of manufacture
Box spring having improved coil spring modules
Box spring having rows of coil springs formed from a single leng
Box spring having snap-on clip for spring securement
Box spring retainer
Box spring unit with metal slats
Box spring with padded cover
Box spring with plastic band support for mattress
Box spring, box spring frame and making same
Box-spring assembly
Boxspring having coil compression stops
Boxspring-mattress set employing slide-preventing means