US Patent 4,814,746

Number:	4,814,746
Title:	Data compression method
Filed:	11-Aug-1986
Granted:	21-Mar-1989
Inventors:	Victor S. Miller, Mark N. Wegman
Assignee:	IBM

Comment by FAQ:A previous application was filed on 6/1/83, three weeks before the application by Welch (4,558,302) Communications between a Host Computing System and a number of remote terminals is enhanced by a data compression method which modifies the data compression method of Lempel and Ziv by addition of new character and new string extensions to improve the compression ratio, and deletion of a least recently used routine to limit the encoding tables to a fixed size to significantly improve data transmission efficiency.