Abstract: An electrical safety monitoring device includes a first set of digital switches and a second set of digital switches for each of a plurality of line inputs, a first set of visual indicators, wherein each of the first set of visual indicators is electrically connected to one of the first set of digital switches and a second set of visual indicators, wherein each of the second set of visual indicators is electrically connected to one of the second set of digital switches. There is a first voltage-controlled oscillator operatively connected to the first set of digital switches for controlling a flash rate of the first set of visual indicators when the positive voltage is present and a second voltage-controlled oscillator operatively connected to the second set of digital switches for controlling a flash rate of the second plurality of visual indicators when a magnitude of the negative voltage is present.

Abstract: An acoustic focusing apparatus helps focus sound waves to target a predictable region. The predictable region may include the ears of a user. The acoustic focusing apparatus provides a plurality of transducers arranged in a planar array; whereas the transducers are on the same plane and mounted along parallel rows. The apparatus further provides a plurality of wave guides extending from a wave output surface on the transducers to focus the sound waves towards the predictable region. The apparatus utilizes at least one reflective portion that reflects the sound waves emitting from the wave guides towards the predictable region, and also helps diffuse and mask the source of the sound waves. In this manner, the apparatus focuses an audio signal directly at a person's ears so as to produce private, high fidelity stereo sound without use of headphones, while simultaneously not disturbing others within the same environment.

Abstract: A small battery operated device with a single button, visible indicator such as an LED contains a GPS receiver, antenna, microprocessor, non-volatile memory and integrated USB port. This device can be configured through custom software to record its own location at pre-defined intervals into its non-volatile memory. Upon retrieval, the apparatus can be plugged into a computer's USB port to download all the recorded geographical location history. This data could then provide a detailed report of where the object to which it was attached has been during the previous hours or days.