LZW license, can i use LZW in own application?

Hello,
i saw an article onadobe.com that mentions that a license
is necessary if someone wants to use LZW:
http://kb2.adobe.com/cps/584/6e584843.html
That article is dated 2006, is it still valid?  What does that mean for an application that i write and is inteded to be open source?
The patent is still valid?
Thanks for any hints,
Torsten.

The patent for the LZW algorithm expired on June 20, 2003.
I would recommend you use Flate compression instead of LZW for better results. You can generate Flate streams using the open source zlib library.

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