(under subclass 4) Devices, in which the throwing movement is produced by mechanical means. Includes devices for mechanically pitching a baseball.
SEE OR SEARCH CLASS
473, Games Using Tangible Projectile,
421, for a batting backstop or cage (used in a playing field or court game or used to practice or train therefor) which may be combined with a projector which uses a centrifugal throwing movement to mechanically pitch a ball, and subclasses 422+ for a device (used to practice or train for the playing of a playing field or court game) which may be combined with a projector which uses a centrifugal throwing movement to mechanically pitch a ball.
