A printing system for a dot printer for printing matrix patterns in the form of aggregated dots which consist of orthogonal rows and columns, has a first memory having first and second memory areas for storing pattern data corresponding to the rows and columns of the dot matrix patterns. The data corresponding...http://www.google.fr/patents/US4704040?utm_source=gb-gplus-shareBrevet US4704040 - Memory device and printing system for dot printer
