Xref: news2.mv.net comp.os.msdos.djgpp:4150 From: lehmann AT mathematik DOT th-darmstadt DOT de (Alexander Lehmann) Newsgroups: comp.os.msdos.djgpp Subject: Re: DJP Date: 21 May 1996 17:55:13 GMT Organization: Technische Hochschule Darmstadt Lines: 24 Distribution: world Message-ID: <4nt021$os6@rs18.hrz.th-darmstadt.de> References: <199605081041 DOT GAA11066 AT delorie DOT com> <4n6uhn$opl AT goliat DOT eik DOT bme DOT hu> <4nsf9f$c9u AT rc1 DOT vub DOT ac DOT be> NNTP-Posting-Host: fb0408.mathematik.th-darmstadt.de To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Vankeerberghen Pieter (pvkeer AT vub DOT ac DOT be) wrote: : Molnar Laszlo (s0052mol AT sun10 DOT vsz DOT bme DOT hu) wrote: : [...] : : Markus (the author of LZO1) sent me some notes, so the next release will : : include some other stuff too (maybe an unpacker). : Aren't the Lempel ZIv codes patented by Unisys ? LZW (Lempel Ziv Welch) is patented by Unisys, since the Welch guy was an employee of Sperry when he developed LZW and Sperry is a predecessor of Unisys in some way. LZ was developed in 77 and 78 by people at IBM and I think IBM has patents for this but, the LZ+Huffman variants used in lharc and zip/gzip seem to be unaffected by this (or maybe the patent has expired). bye, Alexander -- Alexander Lehmann, | "On the Internet, alex AT hal DOT rhein-main DOT de (plain, MIME, NeXT) | nobody knows lehmann AT mathematik DOT th-darmstadt DOT de (plain) | you're a dog." !!CHANGED!!