ALEXANDRIA, Va., July 3 -- United States Patent no. 12,345,087, issued on July 1, was assigned to Assa Abloy Entrance Systems AB (Landskrona, Sweden).
"Door operator system" was invented by Daniel Eliasson (Lund, Sweden) and Anton Hansson (Kivik, Sweden).
According to the abstract* released by the U.S. Patent & Trademark Office: "A door operation system opens and closes an opening with a door. A drive unit mounted on the door and having at least one motor moves the door from the closed (C) position to the open (O) position and vice versa. An elongated transmission member extends along a side of the opening. The drive unit includes a driven transmission member in driving connection with the motor that is movably connected to the elongated ...