In a data transmitting/receiving device having parallel/serial and serial/parallel character conversion, particularly for data exchange between communicating data processing systems, and being arranged between a local data processing system and a data modem terminating a data communication line for the...http://www.google.com/patents/US4388683?utm_source=gb-gplus-sharePatent US4388683 - Data transmission/receiving device having parallel/serial and serial parallel character conversion, particularly for data exchange between communicating data processing systems
