A refillable color ink jet cartridge and method for making same is described. The protective cap on the non-refillable Hewlett-Packard cartridge #51625A (used in printing devices such as the Hewlett-Packard Desk Writer C) and similar cartridges is removed to access the color ink reservoirs to extend...http://www.google.de/patents/US5408256?utm_source=gb-gplus-sharePatent US5408256 - Refillable color ink jet cartridge and method for making said cartridge
