US PATENT SUBCLASS 5 / 220
.~.~.~.~ Screw


Current as of: June, 1999
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5 /   HD   BEDS

131  DF  BEDSTEADS {6}
400  DF  .~ Having bottom {9}
*  DD  .~.~ Fabricated elastic flats {6}
211  DF  .~.~.~ Tighteners {6}
220.~.~.~.~ Screw {5}
221  DF  .~.~.~.~.~> Attachable
222  DF  .~.~.~.~.~> Extensible rods or trusses
223  DF  .~.~.~.~.~> Individual element
224  DF  .~.~.~.~.~> Sliding riser
225.1  DF  .~.~.~.~.~> Sliding end rail


DEFINITION

Classification: 5/220

(under subclass 211) Devices comprising screw devices on the fabric frames to increase the tension on the fabric.

SEE OR SEARCH THIS CLASS, SUBCLASS:

213, for screw actuated levers.