The Doorknob Signal
We’ve seen it before, the universal sign of “I have company, go away” signal. Often taking form as a tie around a doorknob or the potted plant flipped over. There’s got to be a more high-tech way. The Doorknob Condition uses an innovated pulley system that makes the knob on the exterior recess inwards when pulled from the inside.
Designer: Arnaud Lapierre
























