ALEXANDRIA, Va., March 17 -- United States Patent no. 12,575,542, issued on March 17, was assigned to SureFlap Ltd (Cambridge, Great Britain).

"Pet feeders" was invented by Nicholas Patrick Roland Hill (Cambridge, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "Animal feeders, an animal feeding monitor and a method of training an animal to use a feeder. An animal feeder may have a housing including an aperture for a food bowl and having a door for covering the aperture, the feeder including a door mechanism to control movement of the door over the aperture, wherein the feeder including a sensor to detect when an animal has moved away from the aperture, and the feeder is configured to be operable...