Authorized access by a user to an application server in a wireless local area network is obtained by printing machine-readable indicia on a portable, physical ticket, and by presenting the ticket to an electro-optical reader for reading the indicia....http://www.google.co.uk/patents/US7305478?utm_source=gb-gplus-sharePatent US7305478 - Bar code symbol ticketing for authorizing access in a wireless local area communications network
