Latest step of development of a flip panel door (Drehplattentür), 2013 “Klemens Torggler’s door is an invention based on rotating squares, The special construction makes it possible to move the door sideways without the use of tracks. This technical trick opens up new applications for the door.” Isn’t this awesome?! Very chic and artistic. The best part you can’t smack somone by throwing the door open. Or someone being sassy can’t slam it. uhhhh How much? Where can I get this? fuente: