ALEXANDRIA, Va., July 3 -- United States Patent no. 12,345,068, issued on July 1, was assigned to Sundance Spas Inc. (Chino, Calif.).
"Self-maintaining hot tub or spa" was invented by Erica Aloisia Moir (Santa Ana, Calif.), Brian Pierson (Beaverton, Ore.) and Larry R Ovalle (Glendora, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An immersion structure (e.g., hot tub, spa, swim spa, pool, showerhead, whirlpool bathtub, and whirlpool bath) has a water treatment system that includes a nano bubble generator for purifying the water. The water treatment system can further include a gas generator that works in conjunction with the nano bubble generator to create a composition of liquid containing nano bubb...