A cassette player having a cassette changer function has a cassette drive mechanism on which a tape cassette is loaded and which reproduces (or records) the loaded tape cassette, and a drum-like cassette holder which holds a plurality of tape cassettes in a circle surrounding the cassette drive mechanism...http://www.google.de/patents/US5539594?utm_source=gb-gplus-sharePatent US5539594 - Cassette player
