US PATENT SUBCLASS 16 / 22
.~.~ Cylinder

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

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

DEFINITION

Classification: 16/22

(under subclass 20) Casters in which the antifrictional swiveling means comprises cylinders.