In 1966, Brown, along with the assistance of her husband, invented a security system which consisted of four peepholes, a sliding camera, television monitors, and two-way microphones. These items created a closed-circuit television system for surveillance also known as CCTV. With multiple peepholes, the sliding camera was able to capture images of people who were different heights. The two-way microphones allowed Brown to communicate with the person outside. She also had a remote that would allow her to unlock the door at a safer distance. Lastly, she could press an emergency button that would send an alarm to police or security.
Marie van Brittan Brown was an innovator in home security. In 1966, she and her husband created a pioneering security system that incorporated several advanced features for its time:
Four Peepholes: Allowed for monitoring from different heights.
Sliding Camera: Captured images through the peepholes.
Television Monitors: Displayed live footage from the camera.
Two-Way Microphones: Enabled communication with visitors.
Remote Door Unlocking: Provided safer access control.
Emergency Button: Alerted police or security in case of a threat.
This system laid the groundwork for modern CCTV and home security systems.