US PATENT SUBCLASS 297 / 307
.~ Constantly oriented during up-and-down movement


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



297 /   HD   CHAIRS AND SEATS

285  DF  BACK MOVEMENT RESILIENTLY OPPOSED IN OPERATING POSITION {12}
307.~ Constantly oriented during up-and-down movement {2}
308  DF  .~.~> Back immovable relative to bottom
309  DF  .~.~> Bottom component resiliently supports back


DEFINITION

Classification: 297/307

(under subclass 285) Device wherein the back is adjustable vertically and wherein the plane of the back in any position of adjustment is parallel to every position of adjustment.