ckout systemEP1094617A2 *28 Sep 200025 Apr 2001Nortel Networks LimitedMethod and apparatus for providing power to a device over a network transmission mediumEP1372270A1 *26 Feb 200217 Dec 2003Glory AZ System Co., Ltd.Two-wire power transmitting/receiving device and its methodEP1806049A120 Nov 200611 Jul 2007S-Rain Control A/SA two-wire controlling and monitoring system for in particular irrigation