The Difficulties of Patent Busting
wheresjim writes "An article on CNN.com entitled 'Tough road for patent-busters' describes the hard road one has to follow to get a questionable patent revoked. According to the article, of the approx 7,000,000 existing patents, only 614 have been revoked, and only 3927 have had their claims narrowed."
The problem is the patent office doesn't have enough bandwidth to deal with current patents, much less overturn existing ones. There's a quote in the article by a member of the patent office saying that the goal is accuracy balanced very heavily against speed. All of the reviewers have quotas they have to meet, and it takes a lot longer to review a hairy software patent than a physical invention with drawings, but they aren't given the time. There wasn't even a mechanism for overturning patents until 1982, so its not suprising that they aren't good at it yet.
This is a serious question, not meant to flame. Has any one actually recently used a software patent offensively? I know most firms get them for defensive purposes only, not to go sueing other companies. Has there actually been lawsuits to test the validity of a patent on an algorithm?