Marie Van Brittan Brown and her husband, Albert, filed for the patent in 1966 and received approval three years later.

Video doorbells and security cameras have two settings ripe for Halloween upgrades, chimes and Quick Replies. Both are designed to respond when someone (or something) rings the doorbell, so it's a ...

Today's home security devices are smart, easy to use and offer safety when aging in place -- these reasons will help you convince your relatives to adopt them.

In a metal like copper, however, the outer electrons swim around freely and are shared by all the atoms. That’s why ...