ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,376,679, issued on Aug. 5, was assigned to NPK DESIGN B.V. (Leiden, Netherlands).
"Adjustable chair" was invented by Janwillem Bouwknegt (Leiden, Netherlands) and Joseph Elisabeth Oberdorf (Leiden, Netherlands).
According to the abstract* released by the U.S. Patent & Trademark Office: "A piece of furniture comprises a seat, a backrest and a base. At least the seat and the base are movably coupled for reversible relative adjustment in a direction from a first configuration for sitting upright to a second configuration for sitting reclined. One or more support surfaces and a lever are operably coupled to support the seat on the base. The lever rotates about an axis transverse to the se...