ALEXANDRIA, Va., April 7 -- United States Patent no. 12,594,479, issued on April 7, was assigned to Z Enterprises (Las Vegas).

"Pool lap counter" was invented by Robert M. Zeidman (Las Vegas), Carrie L Zeidman (Las Vegas) and John Caldwell (Morgan Hill, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "This invention is an inexpensive, easy-to-use, and easy-to-manufacture device that can be placed on the edge of a pool so that a swimmer can use it to count laps without significantly disrupting the swimming. The invention is lightweight and portable so that one person can carry it around, place it on the pool before swimming laps, and remove it afterwards."

The patent was filed on March 13, 2023, under A...