US Patent 5,049,881

Number:	5,049,881
Title:	Apparatus and method for very high data rate-compression incorporating lossless data compression and expansion utilizing a hashing technique
Filed:	18-Jun-1990
Granted:	17-Sep-1991
Inventors:	Dean K. Gibson, Mark D. Graybill
Assignee:	Intersecting Concepts, Inc.

Comment by FAQ:May cover LZRW1; almost identical with Waterworth (4,701,745).