ALEXANDRIA, Va., June 25 -- United States Patent no. D1,080,915, issued on June 24, was assigned to Radio Systems Corp. (Knoxville, Tenn.).
"Pet door" was invented by Nicholas Renecle (Knoxville, Tenn.), John Spangler (Knoxville, Tenn.) and Kevin Zinn (Knoxville, Tenn.).
The patent was filed on Nov. 3, 2023, under Application No. D/906,324.
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