US Patent 10339736 Remote application for controlling access

A dual authentication access control system for controlling access to a secured area is disclosed, wherein a supervisor is allowed to approve access requests by a person wanting to gain access to the secured area from a remote location. In some cases, the person requesting access to the secured area enters his credentials and submits an access request. If the person's credentials are verified, an access approval request is forwarded to a mobile device of a supervisor. If the supervisor elects to approve access, the supervisor enters his credentials via the supervisor's mobile device. If the supervisor's credentials are verified, the person is granted access to the secured area.