Embodiments of the invention provide systems and methods for brokering the purchase and/or sale of mixed-color glass and/or cullet, optionally over a computer network. In one embodiment, the broker facilitates the purchase and/or sale of three color mixed cullet between beneficiators, MRFs and/or glass...http://www.google.de/patents/US7302407?utm_source=gb-gplus-sharePatent US7302407 - Method, system and computer readable medium for brokering the purchase and sale of glass cullet
