US PATENT SUBCLASS 16 / 20
.~ Antifrictionally swivelled

Current as of: June, 1999
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16 /   HD   MISCELLANEOUS HARDWARE

18 R  DF  CASTERS {20}
20.~ Antifrictionally swivelled {2}
21  DF  .~.~> Ball
22  DF  .~.~> Cylinder {1}

DEFINITION

Classification: 16/20

(under subclass 18) Casters which are antifrictionally swiveled.

SEE OR SEARCH THIS CLASS, SUBCLASS:

48, for multiple wheel casters antifrictionally swiveled.