An automatic changing system for a cassette-type medium, having at least one recording and/or reproducing apparatus, a cassette storage apparatus includes multiple cassette storage compartments, and a cassette transporting apparatus by which a selected cassette may be either picked up from a compartment...http://www.google.de/patents/US4910619?utm_source=gb-gplus-sharePatent US4910619 - Automatic changing system for cassette-type mediums
