ALEXANDRIA, Va., March 12 -- United States Patent no. D1,066,829, issued on March 11, was assigned to Radio Systems Corp. (Knoxville, Tenn.).

"Pet litter box" was invented by Kevin Zinn (Knoxville, Tenn.), Jason Graves (Knoxville, Tenn.), Liu Feng (Tianjin, China), Brandi Sheldon King (Knoxville, Tenn.), Jennifer Marler (Knoxville, Tenn.), Jennifer Thompson (Knoxville, Tenn.) and Kaleigh Veca Smith (Knoxville, Tenn.).

The patent was filed on March 9, 2022, under Application No. D/792,174.

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