US PATENT SUBCLASS 248 / 415
.~.~ Support surface revolves or rotates about vertical axis

Current as of: June, 1999
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248 /   HD   SUPPORTS

127  DF  STAND {14}
158  DF  .~ Standard type {4}
415.~.~ Support surface revolves or rotates about vertical axis {3}
416  DF  .~.~.~> And moves lineally
417  DF  .~.~.~> Self-returning to normal facing position
418  DF  .~.~.~> With means to limit or inhibit rotation

DEFINITION

Classification: 248/415

(under subclass 158) Device including means mounting the support surface for movement around a vertically extending axis.