A mobile self-contained video gaming system. The system internally stores a plurality of standard video game cartridges simultaneously and provides instantaneous external user selection of any game cartridge without power sequencing of the console electronics or physical extraction/insertion of the cartridges....http://www.google.de/patents/US4516777?utm_source=gb-gplus-sharePatent US4516777 - Mobile self-contained video game system with instantaneously selectable game cartridges
