Why not just link to the U.S. Patent Office's copy?
I don't see any reason not to link U.S. patents straight to the actual U.S. patent. Once such a link is established, than any subsequent re-linking to a commercial page would be a clear-cut case of spam in my mind.
I went ahead and changed the Kaleida Labs article. I noticed you were the main contributor for that article; I also noticed that the patent you linked to is now assigned to Quark, Inc.. If that patent's critical to the article, you might consider briefly mentioning the relevance and why Quark has it.
As for these semi-spammy patent edits, you might briefly raise this on the talk page for Wikipedia:WikiProject Spam and see what those folks think. They may also be interested in checking out how pervasive this problem is with bth that site and others like it.
Thanks for shining a light on this one. I hate link-spammers but this probably an innocent new user and I have to remind myself to keep chanting "assume good faith, assume good faith, ..." -- A. B. 15:19, 10 October 2006 (UTC)