US Patent 9867418 Shoe pair with position indicator assembly

A position indicator assembly, including first and second positioning units, is attached to a pair of shoes in positions which are spaced when the shoes are aligned together. Each positioning unit includes a first proximity switch element, at least one indicator, a battery and a second proximity switch element. The battery is electrically connected to the indicator when the first proximity switch element of one of the first and second position units is arranged a predetermined, spaced distance from the second proximity switch element of the other of the first and second positioning units in order to provide a visual and/or audible indication to a wearer that the pair of shoes are on the correct feet.