ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,235, issued on Oct. 14, was assigned to Assa Abloy Entrance Systems AB (Landskrona, Sweden).
"Revolving door" was invented by Magnus Persson (Helsingborg, Sweden) and Mikael Buschow (Malmo, Sweden).
According to the abstract* released by the U.S. Patent & Trademark Office: "A revolving door (100) is provided. The revolving door (100) comprises a base portion (110), an upper portion (120), and a rotating assembly (130) extending between the base portion (110) and the upper portion (120), and at least one door panel (140) connected to the rotating assembly (130) and being rotatably arranged around a central axis (A1). The revolving door (100) further comprises one or more lifting m...