A circuit board of an ink cartridge is provided with a plurality of terminals, with the contact portions of the plurality of terminals forming a plurality of lines. The contact portions of two terminals used for detecting installation are positioned in a first line, and the contact portion of a power...http://www.google.com/patents/US20100289847?utm_source=gb-gplus-sharePatent US20100289847 - RECORDING MATERIAL DELIVERY SYSTEM FOR RECORDING MATERIAL-CONSUMING APPARATUS; CIRCUIT BOARD; STRUCTURAL BODY; AND INK CARTRIDGE
