Abstract: Surfaces in which the cell adhesion properties of the surface are modified by a change in surface potential are generally described.

Abstract: Embodiments of the present disclosure may include a system for returning a golf ball to a golfer playing simulated golf or hitting a golf ball towards any vertical surface or hitting it into a net or such, the system including a ball catcher tray assembly adapted to receive a golf ball after the golfer has hit the ball against an impact surface, the ball catcher tray optionally including ball catcher tray sections connected together. Embodiments may also include a golf ball launcher adapted to receive the golf ball as it rolls from the ball catcher tray assembly. Embodiments may also include a modular track system comprised of interconnected track sections, at least one of which may be connected to the golf ball launcher and may be adapted to receive the golf ball from the golf ball launcher as the ball may be propelled toward the golfer.

Abstract: Embodiments of the present disclosure may include a system for returning a golf ball to a golfer playing simulated golf or hitting a golf ball towards any vertical surface or hitting it into a net or such, the system including a ball catcher tray assembly adapted to receive a golf ball after the golfer has hit the ball against an impact surface, the ball catcher tray optionally including ball catcher tray sections connected together. Embodiments may also include a golf ball launcher adapted to receive the golf ball as it rolls from the ball catcher tray assembly. Embodiments may also include a modular track system comprised of interconnected track sections, at least one of which may be connected to the golf ball launcher and may be adapted to receive the golf ball from the golf ball launcher as the ball may be propelled toward the golfer.

Abstract: A magnetic holder for a funnel or other tool has a tapered, cylindrical shaft. One or more arms extend from the shaft, with a magnets secured to the ends of the arms. The shaft has a wider opening on one end, and a narrower opening on the other end. The funnel or tool may be inserted into the wider opening, while the narrower opening may optionally be capped. The shaft may have interior ribs. The holder, except for the magnets, may be formed of a molded polymer. In use, the magnetic holder may be magnetically attached to a planar surface.

Abstract: A magnetic holder for a funnel or other tool has a tapered, cylindrical shaft. One or more arms extend from the shaft, with a magnets secured to the ends of the arms. The shaft has a wider opening on one end, and a narrower opening on the other end. The funnel or tool may be inserted into the wider opening, while the narrower opening may optionally be capped. The shaft may have interior ribs. The holder, except for the magnets, may be formed of a molded polymer. In use, the magnetic holder may be magnetically attached to a planar surface.