US PATENT SUBCLASS 5 / 248
.~.~.~ Spiral springs only

Current as of: June, 1999
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5 /   HD   BEDS

131  DF  BEDSTEADS {6}
400  DF  .~ Having bottom {9}
246  DF  .~.~ Of springs {3}
248.~.~.~ Spiral springs only {3}
249  DF  .~.~.~.~> Frames, sectional and collapsible {2}
252  DF  .~.~.~.~> Intermediate frames and connections
253  DF  .~.~.~.~> With accessory spring shock absorbers

DEFINITION

Classification: 5/248

(under subclass 246) Devices comprising arrangements of spiral springs forms only and the bounding and confining assemblages of such spring units into a spring bed bottom as a whole. Includes also special arrangements of the spring units, as of higher, deeper, or stronger springs in certain localities.

SEE OR SEARCH THIS CLASS, SUBCLASS:

189, 230+, 231, 239+, and 716+, for other spiral spring features.

260, for special margin rims and means of connecting springs to them.

263+, for means of supporting the bottoms of springs.