A semiconductor device of the MOS/LSI type uses a high speed serial shift register in its input/output system. In a memory device, the serial shift register has a number of stages equal to the number of columns in the memory cell array and is split into two half registers connected to opposite sides...http://www.google.de/patents/US4322635?utm_source=gb-gplus-sharePatent US4322635 - High speed serial shift register for MOS integrated circuit
