US PATENT SUBCLASS 473 / 467
.~.~ Having boundary detector (e.g., ball-out-of-bounds detector for tennis court, etc.)

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}
465  DF  .~ Having at least two different types of game elements used in same game {6}
467.~.~ Having boundary detector (e.g., ball-out-of-bounds detector for tennis court, etc.)

DEFINITION

Classification: 473/467

Having boundary detector (e.g., ball-out-of-bounds detector for tennis court, etc.):

(under subclass 465) Playing field or court game wherein one of the game components is or comprises means for detecting the location of a moving game component or a player relative to (a) a peripheral boundary of a playing field or court, or (b) a structure (e.g., a net, etc.) or a visually or otherwise sensory distinct means which breaks the playing area into compartments, subareas, or sections.

(1) Note. To be classified herein, the boundary detector means must be claimed in combination with at least one other game component.

(2) Note. A target is not considered to be a peripheral boundary structure or a visually or otherwise sensory distinct means which breaks the playing field or court into compartments, subareas, or sections, even though such a target may be located in, on, or form a part thereof. Accordingly, see the appropriate target subclasses for a detector means for detecting the location of a game element or user relative to a target.

SEE OR SEARCH THIS CLASS, SUBCLASS:

570, for a game projectile (e.g., a ball, etc.) which has means specifically intended to actuate a boundary detecting means. Usually, but not necessarily so limited, the projectile is a tennis ball having an electrically conductive surface which, upon striking a boundary of a tennis court, completes an electrical circuit of the boundary detector so as to activate it.

SEE OR SEARCH CLASS

340, Communications: Electrical,

323, for a boundary detector, per se.