A printer specific stream of bits is received, before or while the printing of a print job, and translated into a pixel count specific to the print job and indicative of the anticipated toner usage for the print job. This pixel count then is added to a global pixel count indicative of toner usage of...http://www.google.de/patents/US5937225?utm_source=gb-gplus-sharePatent US5937225 - Pixel counting toner or ink use monitor and pixel counting method for monitoring the toner or ink use
