1
Terry A Welch: High speed data compression and decompression apparatus and method. Sperry Corporation, Howard P Terry, Albert B Cooper, December 10, 1985: US04558302 (296 worldwide citation)

A data compressor compresses an input stream of data character signals by storing in a string table strings of data character signals encountered in the input stream. The compressor searches the input stream to determine the longest match to a stored string. Each stored string comprises a prefix str ...


2
Terry A Welch deceased, Albert B Cooper: Data compression and decompression system with immediate dictionary updating interleaved with string search. Unisys Corporation, Albert B Cooper, Mark T Starr, September 19, 2000: US06121901 (59 worldwide citation)

A dictionary based data compression and decompression system where, in the compressor, when a partial string W and a character C are matched in the dictionary, a new string is entered into the dictionary with C as an extension character on the string PW where P is the string corresponding to the las ...


3
Martin Cohn, Terry A Welch, Abraham Lempel: Coset code generator for computer memory protection. Sperry Corporation, Howard P Terry, February 4, 1986: US04569052 (28 worldwide citation)

An apparatus for protecting computer memory utilizes a parity matrix to generate an n-k check bit signal of an extended linear (n,k,4) code from a k data bit signal. Exclusive-OR gates add the n-k check bit signal to an n-k tag bit signal selected from a predetermined class, to form, when concatenat ...


4
Terry A Welch deceased, Albert B Cooper: Data compression and decompression system with immediate dictionary updating interleaved with string search. Unisys Corporation, Albert B Cooper, Mark T Starr, January 19, 1999: US05861827 (24 worldwide citation)

A dictionary based data compression and decompression system where, in the compressor, when a partial string W and a character C are matched in the dictionary, a new string is entered into the dictionary with C as an extension character on the string PW where P is the string corresponding to the las ...


5
Martin Cohn, Terry A Welch: Address sequencer for overwrite avoidance. Sperry Corporation, Howard P Terry, December 3, 1985: US04556960 (18 worldwide citation)

An address sequencer utilizes binary words generated by Exclusive-OR addition of Gray code words to linear code words to produce a sequence of computer or memory addresses such that the addresses whose indices lie within a selected range of the index of a particular address are a predetermined Hammi ...


6
Terry A Welch, Albert B Cooper: Data compression and decompression system with immediate dictionary updating interleaved with string search. Unisys, feng xun, September 15, 1999: CN97197455

A dictionary based data compression and decompression system where, in the compressor, when a partial string W and a character C are matched in the dictionary, a new string is entered into the dictionary with C as an extension character on the string PW where P is the string corresponding to the las ...