Fortune Magazine has an in-depth article about Microsoft and its claim that free software infringes on 235 of its patents. I don’t know where the truth lies, but Microsoft has more than 800 lawyers and it looks like they are going to make sure that they remain relevant through legal action. This has deep implications for a whole sector of our economy because there are lots of companies that rely on free software (Google being the mindshare leader that I can think of, but most of the startups I interview use LAMP, Linux/Apache/MySQL/PHP, to build their companies).
Microsoft up to this point has used patents defensively (i.e., only if sued themselves) but the gestures that the leadership is sending to the marketplace lately is that they are about to enter into a more offensive phase of using patents.

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