IBM has put out a press release
stating that it is making 500 patents available for free software. The patents can be used with any OSI-approved license, not just the GPL. The full list of freed patents is available in PDF format
. It does not include the famous RCU patents, which remain available to GPL-licensed code only. "IBM intends for this pledge to form the basis of an industry-wide 'patent commons' in which patents are used to establish a platform for further innovations in areas of broad interest to information technology developers and users.
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