Marie Van Brittan Brown invented an early Variation of the trendy dwelling security system in 1966 with the assistance of her partner, Albert. Uncomplicated nonetheless really State-of-the-art for its time, Brown's process designed utilization of peepholes, a closed-circuit digicam procedure, a two-way microphone, and an unexpected emergency alarm. Is the https://www.townplanner.com/directory/247995/