A clip is disclosed for use in joining juxtaposed sound absorbing panels having a sound absorbing material held in a frame extending around the outer edge of the sound absorbing material, said frame having a projecting lip portion. The clip comprises a front plate having opposing end sections; offset...http://www.google.com/patents/US4016689?utm_source=gb-gplus-sharePatent US4016689 - Sound absorbing panel system and method for connecting panels
