ALEXANDRIA, Va., June 17 -- United States Patent no. 12,313,259, issued on May 27, was assigned to RINNAI Corp. (Aichi, Japan).
"Combustion apparatus" was invented by Toshimitsu Nagasaka (Aichi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A thermal insulation material is arranged on an inner surface of a swelling part formed at a side plate part and outwardly swelling in an X-axis direction so as to be sandwiched from both sides in a Z-axis direction by a step outwardly bent in the X-axis direction and positioned an end, in a Z-axis plus direction, of the swelling part and by a structural member of a burner protruding inwardly in the X-axis direction from an end, in the Z-axis minus direction, of th...