US PATENT SUBCLASS 473 / 484
.~.~.~.~.~.~ Having parallelogram linkage

Current as of: June, 1999
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473 /   HD   GAMES USING TANGIBLE PROJECTILE

415  DF  PLAYING FIELD OR COURT GAME; GAME ELEMENT OR ACCESSORY THEREFOR OTHER THAN PROJECTOR OR PROJECTILE, PER SE {14}
476  DF  .~ Goal or target structure for projectile; element thereof {2}
478  DF  .~.~ Apertured or pocketed goal or target (e.g., for hockey, soccer, polo, lacrosse, etc.) {1}
479  DF  .~.~.~ Goal or target is elevated and horizontally disposed (e.g., for basketball, etc.) {3}
481  DF  .~.~.~.~ Backboard or support structure therefor {2}
483  DF  .~.~.~.~.~ With height adjustment feature {1}
484.~.~.~.~.~.~ Having parallelogram linkage

DEFINITION

Classification: 473/484

Having parallelogram linkage:

(under subclass 483) Backboard or support structure therefor wherein the height adjustment mechanism comprises at least two vertically spaced-apart links, each link being pivoted about a horizontal axis at one end to a support member and at the other end to a backboard.