Marie Van Brittan Brown was a nurse and she is known for inventing the home security system. She lived in Queens and at the time, the crime rate was high and the police response was slow, so she didn’t feel safe at her home with her family. That is why she thought of a security system that would make her feel less vulnerable. Brown worked with her husband and attached a camera to the door which could be moved between a few peepholes to be able to see visitors of different heights. The camera was connected to the television monitor, so they could see the visitor while sitting in their bedroom. They also installed a microphone to be able to talk to the person behind the door. Closed-circuit television was invented during World War II, but the Browns were first to use it for a home security system. They filed a patent in 1966, citing Marie as lead inventor. It was approved three years later.