A static air freshener has a frame formed of or with plastic beads impregnated with a scent or aroma. The rate of release of the scent is controlled by the area of the frame to define the useful life of the air freshener. An insert may be place in a void defined by the frame. The insert has a thematic...http://www.google.se/patents/US7111794?utm_source=gb-gplus-sharePatent US7111794 - Static air freshener
