Marie Van Brittan Brown invented an early Variation of the trendy dwelling security system in 1966 with the assistance of her spouse, Albert. Uncomplicated still very Innovative for its time, Brown's technique created use of peepholes, a shut-circuit digital camera technique, a two-way microphone, and an emergency alarm. Its workforce https://vymaps.com/US/The-World-Protection-Group-Inc-VN25283/?id_new=7941f5009f8161e8f314e9838081b666