Innovative security device strikes back at intruders / 24dash.com, 22 March 2007
http://www.24dash.com/news/47/18261/index.htm
Ian Morgan
"A pioneering home protection device which was developed by two Birmingham taxi drivers has now reached the market and, it is hoped, could revolutionise home safety for the elderly.
The DoorDefender is a unique mechanism that fits to the hinge side of a doorframe and cannot be broken or snapped like a conventional door chain."