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Originally published May 15, 2007 at 12:00 AM | Page modified May 15, 2007 at 2:01 AM

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Microsoft says Linux, open source violate patents

Microsoft said the Linux operating system and other freely distributed programs violate 235 of its patents and it wants makers of such software...

Microsoft said the Linux operating system and other freely distributed programs violate 235 of its patents and it wants makers of such software to pay royalties.

The Redmond software company would rather license its technology than litigate, Microsoft said Monday in an e-mailed statement.

Microsoft had earlier said, without detailing claims, that Linux and so-called open-source software violate its patents.

Last year it struck a deal with Novell, the second-largest seller of Linux, in which both agreed not to sue each other's customers. Two weeks later, Microsoft Chief Executive Steve Ballmer said Linux "uses our patented intellectual property."

Some of the patents relate to the Linux graphical design, e-mail, operating-system core and Open Office word-processing and spreadsheet programs that compete with Microsoft Office.

The agreement with Novell eased a longstanding rivalry. At the same time, it came under fire from open-source advocates such as the Free Software Foundation, which develops the General Public License, a popular open-source license used for the core of the Linux operating system.

The group's proposed version 3 of the license terms would prevent future deals of the kind struck between Microsoft and Novell, which also involved the companies agreeing to make their software interoperable.

Microsoft criticized the new version in its statement Monday, saying it "attempts to tear down the bridge between proprietary and open-source software that Microsoft has worked to build with the industry and customers."

Microsoft and Novell's partnership has won customers such as Wal-Mart Stores and Credit Suisse Group.

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