ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,458,154, issued on Nov. 4.
"Play yard mattress" was invented by Henry F. Thorne (Sewickley, Pa.).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention is directed to a mattress base for a child's play yard and to a folding child's play yard with a mattress that utilize securing mechanisms to secure the mattress base upon installation and to prevent a child from lifting the mattress base."
The patent was filed on April 17, 2023, under Application No. 18/135,267.
*For further information, including images, charts and tables, please visit: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool...