US Patent 4,612,532

Number:	4,612,532
Title:	Data compression apparatus and method
Filed:	19-Jun-1984
Granted:	16-Sep-1986
Inventor:	Bacon
Assignee:	Telebyte Corportion

Comment by FAQ:Uses followsets as in the pkzip 0.92 'reduce' algorithm, but the followsets are dynamically updated. This is in effect a sort of order-1 Markov modeling.