A system for security checking or transport of persons by an elevator installation and to a method of operating this system wherein in a person is authenticated by at least one authentication signal. At least one mobile authentication device carried by the person detects an authentication signal of the...http://www.google.de/patents/US20050138385?utm_source=gb-gplus-sharePatent US20050138385 - System for security checking or transport of persons by an elevator installation and a method for operating this system
