Abstract: The present invention relates to an electronic abacus including: a plurality of abacus beads fitted on each of unit-specific support rods mounted on an abacus frame to be slidable in a vertical direction; an abacus bead position detecting unit including a plurality of position detecting means for detecting a position change of each abacus bead from lower parts of the abacus beads fitted on each of the unit-specific support rods; an abacus bead guide panel in which unit-specific guide blocks for guiding movement of the abacus beads fitted on each of the unit-specific support rods are integrally connected to cover all of the abacus bead position detecting unit; and a plurality of abacus bead moving members provided in a number which is the same as that of the abacus beads in the guide panel to movably support the abacus beads fitted on each of the support rods.

Abstract: A device and method of use for a portable lightweight shoulder rehabilitation device that helps prevent shoulder injuries, helps recovery from shoulder injuries, increases shoulder flexibility, and provides strengthening of the shoulder. In one embodiment, the device is comprised of a base having at least one hand grip coupled to at least one guiding path rail to provide the desired movement of the hand and arm to target the shoulder for the desired activity such as warming up, flexibility, strengthening, and/or recovery. In another embodiment, the guiding path rail is comprised of tubing in a vertical semi-circle shape.

Abstract: A handheld electronic book device having asymmetrical shape is described herein. The device includes a display screen and an asymmetrical housing containing the display screen. The non-symmetrical housing has a wedge-shaped configuration, in which one side is comparatively thinker than an opposing side.

Abstract: A score counter includes a bar having two spheres on two ends thereof so as to fix the bar by engaging the two spheres with relative members. A plurality of retaining members each have a score marked therein and extend from an outside of the bar. A plurality of blocks are slidably mounted to the bar and each block is separated by the retaining members on the bar. The hole is sized that the user can move the block over the retaining members by force. The blocks on the bar are separated by the retaining members.