Z:gnu-www-ja-danger-of-software-patents--5d3aef-But LZW is used for other thin/en

But LZW is used for other things, too; for instance the PostScript language specifies operators for LZW compression and LZW uncompression. It's no use having another, better algorithm because it makes a different format of data. They're not interoperable. If you compress it with the gzip algorithm, you won't be able to uncompress it using LZW. So no matter how good your other algorithm is, and no matter what it is, it just doesn't enable you to implement PostScript according to the specs.