A system for removing and disposing of smoke and residues produced by cigarettes or the like includes an ashtray unit adapted to be received by a valved receptacle in a tabletop or the like. The ashtray unit has a cigarette-holding portion and a passage connected to a residue-receiving canister adapted...http://www.google.com/patents/US5361784?utm_source=gb-gplus-sharePatent US5361784 - System for removing and disposing of cigarette and cigar smoke and residues
