US Patent Issued to Aaron DeJule on Oct. 7 for "Chair including a leaf spring in contact with a linkage to provide resistance to tilting of a backrest of the chair" (Illinois, Michigan Inventors)

ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,433,411, issued on Oct. 7, was assigned to Aaron DeJule (River Forest, Ill.).

"Chair including a leaf spring in contact with a linkage to provide resistance to tilting of a backrest of the chair" was invented by Aaron DeJule (River Forest, Ill.), Paul C. Evans (Emmet, Mich.) and Scott Padiak (River Forest, Ill.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A chair, comprising, a backrest, a seat coupled with the backrest, a column coupled with the seat, a linkage statically attached to the backrest and rotatably attached below the seat, a leaf spring statically attached at one end and in direct contact with the linkage to provide a resistance to tilting...