ALEXANDRIA, Va., March 17 -- United States Patent no. 12,579,879, issued on March 17.

"Water safety device" was invented by Colleen Elizabeth Glaeser (London).

According to the abstract* released by the U.S. Patent & Trademark Office: "A water safety device (10) that is adapted to float on water includes an arrangement of video cameras, an accelerometer and a processor. In use, the device floats, for example, in an unattended swimming pool. If an object falls in the pool, the resulting wave disturbance will buffet the floating device, which causes the onboard accelerometer to generate a signal. The video cameras are arranged at the same horizontal level around the periphery of the safety device and, as the device floats, its weight is suc...