By Paul Festa – CNET
A patent underlying one of the Web’s most popular graphics formats is set to expire later this month, raising the question of whether a rival, open format, created as a royalty-free alternative, will become obsolete.
The situation has also rekindled debate about patents, innovation and the freedom of communication.
In the United States, the patent for the Lempel-Ziv-Welch, or LZW, compression algorithm expires June 20. LZW forms the basis of the popular GIF (Graphics Interchange Format) design.