Patent ID: 9557719
Date: 2017-01-31
CPC Classifications: G05B,G07C

Claim:
1. A door access system comprising: a readable door identifier associated with a selected door, wherein the readable door identifier comprises specific shapes that give characteristic echoes to a sound stimulus from a portable wireless device; the portable wireless device that carries a reader for the readable door identifier; an access control unit in at least intermittent communication with the portable wireless device; and an interface unit in at least intermittent communication with the access control unit and with door accessories associated with a plurality of doors, including a door accessory associated the selected door, for controlling access to respective doors of the plurality of doors, wherein the access control unit receives a representation of the readable door identifier from the portable wireless device and responds to the readable door identifier by making an access determination and transmitting a command to the interface unit, and wherein the interface unit receives the command from the access control unit, and responds to the command by providing access via the door accessory associated with the selected door.