Remote file transfer applications often involve a situation where a receiving computer (22) contains a reference file (48) that may be similar, or perhaps even identical to, a source file(46) to be transmitted by a sending computer (20). A file transfer method that identifies and isolates the differences...http://www.google.com/patents/US5446888?utm_source=gb-gplus-sharePatent US5446888 - Remote file transfer method and apparatus
