IBM Donates 500 Patents to Open Source Developers
IBM press release: "IBM has pledged open access to key innovations covered by 500 IBM software patents to people and groups working on open source software. The pledge applies to any individual, community, or company working on or using software that meets the Open Source Initiative (OSI) definition of open source software."List of pledged patents (20 pages, PDF)
Related news from the Washington Post and New York Times (both require registration).
Context: "For each of the past 11 years (1993 - 2003), IBM has been granted more U.S. patents than any other company. During that period IBM has received 25,772 US patents. In 2003, IBM received 3,415 U.S. patents, breaking the record it set previously for the most US patents received in a single year." [Link]