A data transfer device for transferring data in a color digital copier, color printer or similar image forming apparatus of the type using a plurality of different kinds of data. A sending unit assigns other data to a predetermined number of bits of multilevel data to thereby send a plurality of kinds...http://www.google.com.au/patents/US5587813?utm_source=gb-gplus-sharePatent US5587813 - Data transfer device for an image forming apparatus
