An inkjet printer system comprises a first cartridge having one or more ink storage reservoirs, an ink delivery assembly, and a printhead integrated circuit. The system further comprises a second cartridge having one or more ink storage reservoirs, an ink delivery assembly, and a printhead integrated...http://www.google.de/patents/US20090213194?utm_source=gb-gplus-sharePatent US20090213194 - Inkjet Printer System With Interchangeable Printhead Cartridges And Cradles
